diff --git a/README.md b/README.md
index 243febb..c39ae72 100644
--- a/README.md
+++ b/README.md
@@ -3,5 +3,5 @@
 ```
 sudo nixos-rebuild switch --flake .#<host>
 
-nix run .#home-manager -- switch --flake .#<host>
+nix run .#home-manager -- switch --flake .#<username>@<host>
 ```
diff --git a/flake.nix b/flake.nix
index fc42b0b..f8ad23a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -34,6 +34,9 @@
         apps.home-manager = {
           type = "app";
           program = "${hm}/bin/home-manager";
+          meta = {
+            description = "Home Manager for Nix";
+          };
         };
       }
     ));
diff --git a/hosts/arcadia/default.nix b/hosts/arcadia/default.nix
new file mode 100644
index 0000000..f97c99b
--- /dev/null
+++ b/hosts/arcadia/default.nix
@@ -0,0 +1,16 @@
+inputs:
+let
+  mkHost = import ../mkHost.nix inputs;
+in
+mkHost {
+  system = "x86_64-linux";
+  hostname = "Arcadia";
+  users = [
+    {
+      username = "hare";
+      home = ./hare/home-manager.nix;
+      nixos = ./hare/nixos.nix;
+    }
+  ];
+  systemModules = [ ./nixos.nix ];
+}
diff --git a/hosts/arcadia/display.nix b/hosts/arcadia/display.nix
new file mode 100644
index 0000000..3b8ae77
--- /dev/null
+++ b/hosts/arcadia/display.nix
@@ -0,0 +1,11 @@
+{
+  wayland.windowManager.hyprland = {
+    settings = {
+      monitor = [
+        "DP-1, 5120x2880@60, 0x0, 2"
+        "DP-2, 2560x1440@144, 2560x0, 1, transform, 0"
+        "DP-3, 1920x1080@144, -1080x-240, 1, transform, 1"
+      ];
+    };
+  };
+}
diff --git a/hosts/arcadia/hardware-configuration.nix b/hosts/arcadia/hardware-configuration.nix
new file mode 100644
index 0000000..43af020
--- /dev/null
+++ b/hosts/arcadia/hardware-configuration.nix
@@ -0,0 +1,58 @@
+{
+  config,
+  lib,
+  pkgs,
+  modulesPath,
+  ...
+}:
+{
+  imports = [
+    (modulesPath + "/installer/scan/not-detected.nix")
+  ];
+
+  boot.initrd.availableKernelModules = [
+    "nvme"
+    "xhci_pci"
+    "ahci"
+    "usb_storage"
+    "usbhid"
+    "sd_mod"
+  ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ "kvm-amd" ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" = {
+    device = "/dev/disk/by-uuid/f3934858-078f-463a-9dd3-d6ba220ced6d";
+    fsType = "ext4";
+  };
+
+  fileSystems."/boot" = {
+    device = "/dev/disk/by-uuid/FFAC-0945";
+    fsType = "vfat";
+    options = [
+      "fmask=0077"
+      "dmask=0077"
+    ];
+  };
+
+  swapDevices = [ ];
+
+  networking.useDHCP = lib.mkDefault true;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+  hardware.cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+
+  hardware.graphics = {
+    enable = true;
+    extraPackages = with pkgs; [
+      mesa
+      libva
+      libvdpau-va-gl
+      vulkan-loader
+      vulkan-validation-layers
+      mesa.opencl # Enables Rusticl (OpenCL) support
+      rocmPackages.clr.icd
+    ];
+  };
+}
diff --git a/hosts/arcadia/hare/home-manager.nix b/hosts/arcadia/hare/home-manager.nix
new file mode 100644
index 0000000..22d5224
--- /dev/null
+++ b/hosts/arcadia/hare/home-manager.nix
@@ -0,0 +1,92 @@
+{
+  pkgs,
+  inputs,
+  lib,
+  ...
+}:
+{
+  home.stateVersion = "25.05";
+  imports = [
+    inputs.nix-index-database.homeModules.nix-index
+    ../display.nix
+    ../../../home-manager/tofi.nix
+    ../../../home-manager/hyprland
+    ../../../home-manager/fnott.nix
+    ../../../home-manager/wezterm
+    ../../../home-manager/fish
+    ../../../home-manager/vscode.nix
+    ../../../home-manager/direnv.nix
+    ../../../home-manager/firefox.nix
+    ../../../home-manager/obs-studio.nix
+    ../../../home-manager/zeditor.nix
+    ../../../home-manager/blender.nix
+    ../../../home-manager/voicevox.nix
+  ];
+  hare.hyprland = {
+    input.sensitivity = -1.0;
+    wallpaperCommand = "swww img /usr/share/wallpaper/arknights-02.jpg";
+  };
+
+  programs.nix-index-database.comma.enable = true;
+
+  home.packages = with pkgs; [
+    vivaldi
+    google-chrome
+    discord
+    helvum
+    plemoljp
+    plemoljp-nf
+    prismlauncher
+    scrcpy
+    tetrio-desktop
+    kicad
+    gimp
+    inkscape
+    obsidian
+    kdePackages.filelight
+    inputs.zen-browser.packages."${stdenv.hostPlatform.system}".default
+    (deno.overrideAttrs (oldAttrs: {
+      doCheck = false;
+    }))
+    nodejs_24
+    godot
+    unityhub
+    nixd
+    rust-analyzer
+    aseprite
+    bambu-studio
+    orca-slicer
+    davinci-resolve
+  ];
+  services.easyeffects = {
+    enable = true;
+  };
+
+  programs.git = {
+    enable = true;
+    settings.user.name = "Hare";
+    settings.user.email = "kei.hiracchi.0928@gmail.com";
+  };
+
+  fonts = {
+    fontconfig = {
+      defaultFonts = {
+        serif = [ "Noto Serif" ];
+        sansSerif = [ "Noto Sans" ];
+        monospace = [ "PlemolJP NF Console" ];
+      };
+    };
+  };
+
+  xdg.mimeApps = {
+    enable = true;
+
+    defaultApplications = {
+      "text/html" = "vivaldi-stable.desktop";
+      "x-scheme-handler/http" = "vivaldi-stable.desktop";
+      "x-scheme-handler/https" = "vivaldi-stable.desktop";
+      "x-scheme-handler/about" = "vivaldi-stable.desktop";
+      "x-scheme-handler/unknown" = "vivaldi-stable.desktop";
+    };
+  };
+}
diff --git a/hosts/arcadia/hare/nixos.nix b/hosts/arcadia/hare/nixos.nix
new file mode 100644
index 0000000..6cf7c57
--- /dev/null
+++ b/hosts/arcadia/hare/nixos.nix
@@ -0,0 +1,14 @@
+{ pkgs, ... }:
+{
+  extraGroups = [
+    "adbusers"
+    "docker"
+  ];
+  shell = pkgs.fish;
+  openssh.authorizedKeys.keys = [
+    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIIfql/a6ZtxOPgBhFzOfgTO6HGcy0Se9mgMLmOa40vMF"
+    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIIW2Yrqwi4YjIrdI8mygX5pTHDPmrUgbmpZ4WxoTqORi keihi@Vostro-LapTop"
+    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAICi8Cciepfs1ikPdfyHjc9qJX5z2QLFF9jBszsyEvCMA nix-on-droid@localhost"
+    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAID8Eo/QDJtXqluvjNx5ZpeIt0c/yf/Mgr7dKhNWAICZX hare@x1carbon"
+  ];
+}
diff --git a/hosts/arcadia/nixos.nix b/hosts/arcadia/nixos.nix
new file mode 100644
index 0000000..fa44d0d
--- /dev/null
+++ b/hosts/arcadia/nixos.nix
@@ -0,0 +1,114 @@
+{ pkgs, ... }:
+let
+  config.boot.kernelPackages = pkgs.linuxPackages_latest;
+in
+{
+  system.stateVersion = "25.11";
+
+  cornflake.greeter.monitors = [
+    "DP-1, 5120x2880@60, 0x0, 2"
+    "DP-2, disable"
+    "DP-3, disable"
+  ];
+
+  imports = [
+    ./hardware-configuration.nix
+
+    ../../system/core
+    ../../programs/ssh.nix
+    ../../programs/utility.nix
+    ../../programs/shell.nix
+    ../../programs/docker.nix
+    ../../programs/v4l2.nix
+    ../../programs/desktop/hyprland.nix
+    ../../programs/fcitx.nix
+    ../../programs/steam.nix
+  ];
+  environment.systemPackages = with pkgs; [
+    cargo
+    rustc
+    rustfmt
+    openssl
+    vulkan-tools
+    android-tools
+    android-file-transfer
+
+    rocmPackages.rocm-runtime
+    rocmPackages.rocminfo
+    rocmPackages.clr
+    rocmPackages.rocm-smi
+
+    qemu
+    (pkgs.writeShellScriptBin "qemu-system-x86_64-uefi" ''
+      qemu-system-x86_64 \
+        -bios ${pkgs.OVMF.fd}/FV/OVMF.fd \
+        "$@"
+    '')
+
+    wineWow64Packages.waylandFull
+    winetricks
+
+    bluez
+    bluez-tools
+    bluetuith
+    obexftp
+    fzf
+    ghq
+  ];
+  environment.sessionVariables.NIXOS_OZONE_WL = "1";
+
+  programs.nix-ld.enable = true;
+
+  services.openssh.enable = true;
+
+  services.udisks2.enable = true;
+
+  networking.firewall.allowedTCPPorts = [
+    8080
+    22
+    5173
+    8000
+    9001
+    2222 # crtb server
+    11434
+  ];
+  networking.firewall.allowedUDPPorts = [ ];
+
+  services.udev.extraRules = ''
+    ATTRS{idVendor}=="3151", ATTRS{idProduct}=="502d", MODE="0777"
+    ATTRS{idVendor}=="414", ATTRS{idProduct}=="211a", MODE="0777"
+    KERNEL=="hidraw*", SUBSYSTEM=="hidraw", MODE="0660", GROUP="input"
+  '';
+
+  hardware.bluetooth = {
+    enable = true;
+    package = pkgs.bluez;
+    powerOnBoot = true;
+    settings = {
+      General = {
+        ControllerMode = "dual";
+        Experimental = true;
+        KernelExperimental = true;
+        FastConnectable = true;
+        # セキュリティレベルを調整
+        Class = "0x000100";
+        # ペアリングタイムアウトを延長
+        PairableTimeout = 0;
+      };
+      Policy = {
+        AutoEnable = true;
+      };
+    };
+  };
+
+  boot.kernelPackages = config.boot.kernelPackages;
+  boot.extraModulePackages = [ config.boot.kernelPackages.v4l2loopback ];
+  boot.kernelModules = [
+    "v4l2loopback"
+  ];
+
+  boot.loader.systemd-boot.enable = true;
+  boot.loader.efi.canTouchEfiVariables = true;
+
+  boot.initrd.kernelModules = [ "amdgpu" ];
+}
diff --git a/hosts/default.nix b/hosts/default.nix
index 362e6e4..f264c5c 100644
--- a/hosts/default.nix
+++ b/hosts/default.nix
@@ -1,8 +1,12 @@
-inputs:
-rec {
+inputs: rec {
   hosts = {
     aqua = import ./aqua inputs;
+    arcadia = import ./arcadia inputs;
+    x1carbon = import ./x1carbon inputs;
+    fungus = import ./fungus inputs;
   };
   nixos = builtins.mapAttrs (_: host: host.nixos) hosts;
-  home-manager = builtins.foldl' (a: b: a // b) { } (map (h: h.home-manager) (builtins.attrValues hosts));
+  home-manager = builtins.foldl' (a: b: a // b) { } (
+    map (h: h.home-manager) (builtins.attrValues hosts)
+  );
 }
diff --git a/hosts/fungus/default.nix b/hosts/fungus/default.nix
new file mode 100644
index 0000000..e5990a5
--- /dev/null
+++ b/hosts/fungus/default.nix
@@ -0,0 +1,16 @@
+inputs:
+let
+  mkHost = import ../mkHost.nix inputs;
+in
+mkHost {
+  system = "x86_64-linux";
+  hostname = "Fungus";
+  users = [
+    {
+      username = "hare";
+      home = ./hare/home-manager.nix;
+      nixos = ./hare/nixos.nix;
+    }
+  ];
+  systemModules = [ ./nixos.nix ];
+}
diff --git a/hosts/fungus/hardware-configuration.nix b/hosts/fungus/hardware-configuration.nix
new file mode 100644
index 0000000..7bc80b1
--- /dev/null
+++ b/hosts/fungus/hardware-configuration.nix
@@ -0,0 +1,44 @@
+# and may be overwritten by future invocations.  Please make changes
+# to /etc/nixos/configuration.nix instead.
+{
+  config,
+  lib,
+  pkgs,
+  modulesPath,
+  ...
+}:
+
+{
+  imports = [
+    (modulesPath + "/installer/scan/not-detected.nix")
+  ];
+
+  boot.initrd.availableKernelModules = [
+    "xhci_pci"
+    "ahci"
+    "usbhid"
+    "usb_storage"
+    "sd_mod"
+    "sr_mod"
+  ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ "kvm-amd" ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" = {
+    device = "/dev/disk/by-uuid/e4eb343c-d88f-4d63-99aa-c2c41d8580db";
+    fsType = "ext4";
+  };
+
+  swapDevices = [ ];
+
+  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
+  # (the default) this is the recommended approach. When using systemd-networkd it's
+  # still possible to use this option, but it's recommended to use it in conjunction
+  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
+  networking.useDHCP = lib.mkDefault true;
+  # networking.interfaces.enp3s0.useDHCP = lib.mkDefault true;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+  hardware.cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+}
diff --git a/hosts/fungus/hare/home-manager.nix b/hosts/fungus/hare/home-manager.nix
new file mode 100644
index 0000000..ed6d331
--- /dev/null
+++ b/hosts/fungus/hare/home-manager.nix
@@ -0,0 +1,25 @@
+{ pkgs, ... }:
+{
+  home.stateVersion = "25.05";
+  imports = [
+    ../../../home-manager/direnv.nix
+    ../../../home-manager/wezterm
+    ../../../home-manager/fish
+  ];
+  home.packages = with pkgs; [ ];
+  programs.git = {
+    enable = true;
+    settings.user.name = "Hare";
+    settings.user.email = "kei.hiracchi.0928@gmail.com";
+  };
+
+  fonts = {
+    fontconfig = {
+      defaultFonts = {
+        serif = [ "Noto Serif" ];
+        sansSerif = [ "Noto Sans" ];
+        monospace = [ "PlemolJP NF Console" ];
+      };
+    };
+  };
+}
diff --git a/hosts/fungus/hare/nixos.nix b/hosts/fungus/hare/nixos.nix
new file mode 100644
index 0000000..39bce37
--- /dev/null
+++ b/hosts/fungus/hare/nixos.nix
@@ -0,0 +1,11 @@
+{ pkgs, ... }:
+{
+  extraGroups = [
+    "docker"
+  ];
+  shell = pkgs.fish;
+  openssh.authorizedKeys.keys = [
+    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIBd45JtvgM44KUqhp3Xl2Wtt6rmxU13c/84YLyGKigkG hare@nixos"
+    "ssh-rsa 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 hare@hr-r620"
+  ];
+}
diff --git a/hosts/fungus/nixos.nix b/hosts/fungus/nixos.nix
new file mode 100644
index 0000000..460eb96
--- /dev/null
+++ b/hosts/fungus/nixos.nix
@@ -0,0 +1,31 @@
+{ pkgs, ... }:
+{
+  system.stateVersion = "25.05";
+
+  imports = [
+    ./hardware-configuration.nix
+
+    ../../system/core
+    ../../programs/ssh.nix
+    ../../programs/utility.nix
+    ../../programs/shell.nix
+    ../../programs/docker.nix
+  ];
+  environment.systemPackages = with pkgs; [
+  ];
+
+  boot.loader.grub.enable = true;
+  boot.loader.grub.device = "/dev/sda";
+  boot.loader.grub.useOSProber = true;
+  boot.loader.efi.canTouchEfiVariables = true;
+
+  programs.nix-ld.enable = true;
+
+  services.openssh.enable = true;
+
+  networking.firewall.allowedTCPPorts = [
+    22
+    25565
+  ];
+  networking.firewall.allowedUDPPorts = [ ];
+}
diff --git a/hosts/mkHost.nix b/hosts/mkHost.nix
index 9c9047a..d29ef6e 100644
--- a/hosts/mkHost.nix
+++ b/hosts/mkHost.nix
@@ -15,22 +15,30 @@ in
   nixos = inputs.nixpkgs.lib.nixosSystem {
     modules =
       systemModules
-      ++ (map (u: { pkgs, ... }: {
-        users.users.${u.username} = import u.userNixos { inherit pkgs; };
-      }) (builtins.filter (u: u ? userNixos) users))
+      ++ (map (
+        u:
+        { pkgs, ... }:
+        {
+          users.users.${u.username} = import (if u ? userNixos then u.userNixos else u.nixos) {
+            inherit pkgs;
+          };
+        }
+      ) (builtins.filter (u: u ? userNixos || u ? nixos) users))
       ++ [
         {
-          users.users = builtins.listToAttrs (map (u: {
-            name = u.username;
-            value = {
-              isNormalUser = true;
-              description = "";
-              extraGroups = [
-                "networkmanager"
-                "wheel"
-              ];
-            };
-          }) users);
+          users.users = builtins.listToAttrs (
+            map (u: {
+              name = u.username;
+              value = {
+                isNormalUser = true;
+                description = "";
+                extraGroups = [
+                  "networkmanager"
+                  "wheel"
+                ];
+              };
+            }) users
+          );
         }
       ];
     inherit system;
@@ -39,24 +47,27 @@ in
       users = map (u: u.username) users;
     };
   };
-  home-manager = builtins.listToAttrs (map (u: {
-    name = "${u.username}@${hostname}";
-    value = inputs.home-manager.lib.homeManagerConfiguration {
-      inherit pkgs;
-      extraSpecialArgs = {
-        inherit inputs hostname;
-        username = u.username;
+  home-manager = builtins.listToAttrs (
+    map (u: {
+      name = "${u.username}@${hostname}";
+      value = inputs.home-manager.lib.homeManagerConfiguration {
+        inherit pkgs;
+        extraSpecialArgs = {
+          inherit inputs hostname;
+          username = u.username;
+        };
+        modules = [
+          {
+            home = {
+              username = u.username;
+              homeDirectory = "/home/${u.username}";
+            };
+            programs.home-manager.enable = true;
+          }
+          (import ../system/home-manager)
+        ]
+        ++ (if u ? homeModule then u.homeModule else [ u.home ]);
       };
-      modules = [
-        {
-          home = {
-            username = u.username;
-            homeDirectory = "/home/${u.username}";
-          };
-          programs.home-manager.enable = true;
-        }
-        (import ../system/home-manager)
-      ] ++ u.homeModule;
-    };
-  }) users);
+    }) users
+  );
 }
diff --git a/hosts/x1carbon/default.nix b/hosts/x1carbon/default.nix
new file mode 100644
index 0000000..d3a2bc0
--- /dev/null
+++ b/hosts/x1carbon/default.nix
@@ -0,0 +1,16 @@
+inputs:
+let
+  mkHost = import ../mkHost.nix inputs;
+in
+mkHost {
+  system = "x86_64-linux";
+  hostname = "x1carbon";
+  users = [
+    {
+      username = "hare";
+      home = ./hare/home-manager.nix;
+      nixos = ./hare/nixos.nix;
+    }
+  ];
+  systemModules = [ ./nixos.nix ];
+}
diff --git a/hosts/x1carbon/hardware-configuration.nix b/hosts/x1carbon/hardware-configuration.nix
new file mode 100644
index 0000000..50fa13e
--- /dev/null
+++ b/hosts/x1carbon/hardware-configuration.nix
@@ -0,0 +1,31 @@
+# Do not modify this file!  It was generated by ‘nixos-generate-config’
+# and may be overwritten by future invocations.  Please make changes
+# to /etc/nixos/configuration.nix instead.
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports =
+    [ (modulesPath + "/installer/scan/not-detected.nix")
+    ];
+
+  boot.initrd.availableKernelModules = [ "xhci_pci" "ehci_pci" "ahci" "usb_storage" "sd_mod" "sdhci_pci" ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" =
+    { device = "/dev/disk/by-uuid/92c8bab5-07b9-4394-888d-6cb481972018";
+      fsType = "ext4";
+    };
+
+  fileSystems."/boot" =
+    { device = "/dev/disk/by-uuid/1711-8E2B";
+      fsType = "vfat";
+      options = [ "fmask=0077" "dmask=0077" ];
+    };
+
+  swapDevices = [ ];
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+  hardware.cpu.intel.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+}
diff --git a/hosts/x1carbon/hare/home-manager.nix b/hosts/x1carbon/hare/home-manager.nix
new file mode 100644
index 0000000..9df1921
--- /dev/null
+++ b/hosts/x1carbon/hare/home-manager.nix
@@ -0,0 +1,68 @@
+{
+  pkgs,
+  inputs,
+  lib,
+  ...
+}:
+{
+  home.stateVersion = "25.05";
+  imports = [
+    ../../../home-manager/hyprland
+    ../../../home-manager/tofi.nix
+    ../../../home-manager/fnott.nix
+    ../../../home-manager/direnv.nix
+    ../../../home-manager/obs-studio.nix
+    ../../../home-manager/wezterm
+    ../../../home-manager/fish
+  ];
+  hare.hyprland = {
+    style = import ../../../home-manager/hyprland/styles/thin.nix { inherit lib; };
+    input.sensitivity = -0.6;
+    wallpaperCommand = "swww img /usr/share/wallpaper/";
+  };
+  home.packages = with pkgs; [
+    vivaldi
+    discord
+    helvum
+    plemoljp
+    plemoljp-nf
+    prismlauncher
+    scrcpy
+    gimp
+    zed-editor
+    deno
+    nodejs_latest
+    # aseprite
+  ];
+  services.easyeffects = {
+    enable = true;
+  };
+
+  programs.git = {
+    enable = true;
+    settings.user.name = "Hare";
+    settings.user.email = "kei.hiracchi.0928@gmail.com";
+  };
+
+  fonts = {
+    fontconfig = {
+      defaultFonts = {
+        serif = [ "Noto Serif" ];
+        sansSerif = [ "Noto Sans" ];
+        monospace = [ "PlemolJP NF Console" ];
+      };
+    };
+  };
+
+  xdg.mimeApps = {
+    enable = true;
+
+    defaultApplications = {
+      "text/html" = "vivaldi-stable.desktop";
+      "x-scheme-handler/http" = "vivaldi-stable.desktop";
+      "x-scheme-handler/https" = "vivaldi-stable.desktop";
+      "x-scheme-handler/about" = "vivaldi-stable.desktop";
+      "x-scheme-handler/unknown" = "vivaldi-stable.desktop";
+    };
+  };
+}
diff --git a/hosts/x1carbon/hare/nixos.nix b/hosts/x1carbon/hare/nixos.nix
new file mode 100644
index 0000000..ee983de
--- /dev/null
+++ b/hosts/x1carbon/hare/nixos.nix
@@ -0,0 +1,11 @@
+{ pkgs, ... }:
+{
+  extraGroups = [
+    "docker"
+  ];
+  shell = pkgs.fish;
+  openssh.authorizedKeys.keys = [
+    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIIfql/a6ZtxOPgBhFzOfgTO6HGcy0Se9mgMLmOa40vMF"
+    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIIW2Yrqwi4YjIrdI8mygX5pTHDPmrUgbmpZ4WxoTqORi keihi@Vostro-LapTop"
+  ];
+}
diff --git a/hosts/x1carbon/nixos.nix b/hosts/x1carbon/nixos.nix
new file mode 100644
index 0000000..d052e55
--- /dev/null
+++ b/hosts/x1carbon/nixos.nix
@@ -0,0 +1,88 @@
+{ pkgs, ... }:
+let
+  config.boot.kernelPackages = pkgs.linuxPackages_latest;
+in
+{
+  system.stateVersion = "25.11";
+
+  imports = [
+    ./hardware-configuration.nix
+
+    ../../system/core
+    ../../programs/ssh.nix
+    ../../programs/utility.nix
+    ../../programs/shell.nix
+    ../../programs/docker.nix
+    ../../programs/v4l2.nix
+    ../../programs/desktop/hyprland.nix
+    ../../programs/fcitx.nix
+    ../../programs/steam.nix
+  ];
+  environment.systemPackages = with pkgs; [
+    openssl
+
+    bluetuith
+
+    brightnessctl
+
+    fzf
+    ghq
+
+    android-tools
+  ];
+  environment.sessionVariables.NIXOS_OZONE_WL = "1";
+
+  programs.nix-ld.enable = true;
+  programs.light.enable = true;
+
+  services.openssh.enable = true;
+
+  services.udisks2.enable = true;
+
+  networking.firewall.allowedTCPPorts = [
+    22
+  ];
+  networking.firewall.allowedUDPPorts = [ ];
+
+  services.openvpn.servers = {
+    homeVPN = {
+      config = ''config /root/nixos/openvpn/homeVPN.conf '';
+    };
+  };
+
+  services.udev.extraRules = ''
+    ATTRS{idVendor}=="3151", ATTRS{idProduct}=="502d", MODE="0777"
+    ATTRS{idVendor}=="414", ATTRS{idProduct}=="211a", MODE="0777"
+    KERNEL=="hidraw*", SUBSYSTEM=="hidraw", MODE="0660", GROUP="input"
+  '';
+
+  hardware.bluetooth = {
+    enable = true;
+    package = pkgs.bluez;
+    powerOnBoot = true;
+    settings = {
+      General = {
+        ControllerMode = "dual";
+        Experimental = true;
+        KernelExperimental = true;
+        FastConnectable = true;
+        # セキュリティレベルを調整
+        Class = "0x000100";
+        # ペアリングタイムアウトを延長
+        PairableTimeout = 0;
+      };
+      Policy = {
+        AutoEnable = true;
+      };
+    };
+  };
+
+  boot.kernelPackages = config.boot.kernelPackages;
+  boot.extraModulePackages = [ config.boot.kernelPackages.v4l2loopback ];
+  boot.kernelModules = [
+    "v4l2loopback"
+  ];
+
+  boot.loader.systemd-boot.enable = true;
+  boot.loader.efi.canTouchEfiVariables = true;
+}