diff --git a/.gitignore b/.gitignore
index 4b841b2..98ec178 100644
--- a/.gitignore
+++ b/.gitignore
@@ -25,3 +25,5 @@ hs_err_pid*
 .idea/
 *.iml
 .gradle/
+build/
+out/
diff --git a/src/main/java/guild/Guild.kt b/src/main/java/guild/Guild.kt
new file mode 100644
index 0000000..8cb98f8
--- /dev/null
+++ b/src/main/java/guild/Guild.kt
@@ -0,0 +1,5 @@
+package guild
+
+import java.util.*
+
+class Guild(val masterUUID: UUID, val memberUUIDList: List<UUID>, val name: String)
diff --git a/src/main/java/guild/GuildContainer.kt b/src/main/java/guild/GuildContainer.kt
new file mode 100644
index 0000000..fa3d2ca
--- /dev/null
+++ b/src/main/java/guild/GuildContainer.kt
@@ -0,0 +1,34 @@
+package guild
+
+import org.bukkit.Bukkit
+import java.util.*
+
+class GuildContainer() {
+
+    private val guildSet: MutableSet<Guild> = mutableSetOf()
+
+    fun createGuild(masterUUID: UUID, name: String) {
+        if (permitsToCreateBy(masterUUID)) {
+            guildSet.add(Guild(masterUUID, listOf(), name))
+            Bukkit.getServer().getPlayer(masterUUID)?.sendMessage("Your guild '$name' has been initialized!!")
+        }
+    }
+
+    fun destroyGuild(masterUUID: UUID) {
+        val masterPlayer = Bukkit.getServer().getPlayer(masterUUID) ?: return
+        val removedGuild = guildSet.find { it.masterUUID == masterUUID }
+        if (removedGuild == null) {
+            masterPlayer.sendMessage("You do not have guild.")
+            return
+        }
+        if (guildSet.remove(removedGuild)) {
+            masterPlayer.sendMessage("Your guild '${removedGuild.name}' has been dissolved!!")
+        } else {
+            masterPlayer.sendMessage("Failed to dissolve your guild.")
+        }
+    }
+
+    fun permitsToCreateBy(builderUUID: UUID): Boolean {
+        return guildSet.none { guild -> guild.masterUUID == builderUUID }
+    }
+}
diff --git a/src/main/java/life/grass/sarcandra/GuildCommandExecutor.kt b/src/main/java/life/grass/sarcandra/GuildCommandExecutor.kt
new file mode 100644
index 0000000..9e7cd53
--- /dev/null
+++ b/src/main/java/life/grass/sarcandra/GuildCommandExecutor.kt
@@ -0,0 +1,36 @@
+package life.grass.sarcandra
+
+import guild.GuildContainer
+import org.bukkit.command.Command
+import org.bukkit.command.CommandExecutor
+import org.bukkit.command.CommandSender
+import org.bukkit.entity.Player
+
+class GuildCommandExecutor(private val guildContainer: GuildContainer) : CommandExecutor {
+
+    public override fun onCommand(sender: CommandSender, command: Command, label: String, args: Array<out String>): Boolean {
+        if (args.isEmpty()) return false
+        val senderPlayer = sender as? Player ?: return false
+        when (args[0].toUpperCase()) {
+            "INIT" -> {
+                if (args[1].isNullOrBlank()) {
+                    guildContainer.createGuild(senderPlayer.uniqueId, args[1])
+                }
+            }
+            "DISBAND" -> {
+                guildContainer.destroyGuild(senderPlayer.uniqueId)
+            }
+            "INVITE" -> {
+                println("invite")
+            }
+            "CONFIRM" -> {
+                println("confirm")
+            }
+            "LEAVE" -> {
+                println("leave")
+            }
+            else -> return@onCommand false
+        }
+        return true
+    }
+}
diff --git a/src/main/java/life/grass/sarcandra/Sarcandra.kt b/src/main/java/life/grass/sarcandra/Sarcandra.kt
index 895efb2..4c76635 100644
--- a/src/main/java/life/grass/sarcandra/Sarcandra.kt
+++ b/src/main/java/life/grass/sarcandra/Sarcandra.kt
@@ -1,11 +1,13 @@
 package life.grass.sarcandra
 
+import guild.GuildContainer
 import org.bukkit.plugin.java.JavaPlugin
 
 class Sarcandra : JavaPlugin() {
 
     override fun onEnable() {
         super.onEnable()
+        getCommand("guild")?.setExecutor(GuildCommandExecutor(GuildContainer()))
     }
 
 }
\ No newline at end of file
diff --git a/src/main/resources/plugin.yml b/src/main/resources/plugin.yml
index ee660cb..0fdd528 100644
--- a/src/main/resources/plugin.yml
+++ b/src/main/resources/plugin.yml
@@ -2,3 +2,14 @@ name: Sarcandra
 version: @version@
 depend: [Arabidopsis]
 main: life.grass.sarcandra.Sarcandra
+commands:
+  guild:
+    description: Sarcandra commands of guild.
+    usage: /guild [init/disband/invite/confirm/leave]
+    permission: sarcandra.guild
+    permission-message: sorry, you do not have permission to do.
+permissions:
+  sarcandra.*:
+    default: op
+  sarcandra.guild:
+    default: true