diff --git a/lefthook.yml b/lefthook.yml
index 0c728e4..85dc788 100644
--- a/lefthook.yml
+++ b/lefthook.yml
@@ -2,4 +2,4 @@ pre-commit:
   commands:
     check:
       glob: "*.{js,ts,cjs,mjs,d.cts,d.mts,jsx,tsx,json,jsonc}"
-      run: bunx biome format --write {staged_files}
\ No newline at end of file
+      run: bunx @biomejs/biome check --write {staged_files} && git add {staged_files}
diff --git a/package.json b/package.json
index bfa6fd5..7a7fc7f 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,7 @@
 		"build": "bun vite build",
 		"lint": "eslint .",
 		"preview": "bun vite preview",
-		"format": "bunx biome check . --write"
+		"format": "bunx @biomejs/biome check . --write"
 	},
 	"dependencies": {},
 	"devDependencies": {
diff --git a/rr/.env.example b/rr/.env.example
index 89bb7a8..a55391f 100644
--- a/rr/.env.example
+++ b/rr/.env.example
@@ -1,4 +1,4 @@
 NODE_ENV=development
 DATABASE_URL=postgres://user:postgres@localhost:5432/
 BETTER_AUTH_SECRET=
-BETTER_AUTH_URL=http://localhost:3000
+BETTER_AUTH_URL=http://localhost:5173
diff --git a/rr/app/lib/auth-client.ts b/rr/app/lib/auth-client.ts
index 9ccd525..b51b765 100644
--- a/rr/app/lib/auth-client.ts
+++ b/rr/app/lib/auth-client.ts
@@ -1,2 +1,5 @@
+import { anonymousClient } from "better-auth/client/plugins";
 import { createAuthClient } from "better-auth/react";
-export const authClient = createAuthClient({});
+export const authClient = createAuthClient({
+	plugins: [anonymousClient()],
+});
diff --git a/rr/app/lib/auth.ts b/rr/app/lib/auth.ts
index 56aa10c..69be51b 100644
--- a/rr/app/lib/auth.ts
+++ b/rr/app/lib/auth.ts
@@ -1,5 +1,7 @@
 import { betterAuth } from "better-auth";
 import { drizzleAdapter } from "better-auth/adapters/drizzle";
+import { anonymous } from "better-auth/plugins";
+import { eq } from "drizzle-orm";
 import { getDB } from "./db";
 
 export function getAuth(env?: Env) {
@@ -10,6 +12,18 @@ export function getAuth(env?: Env) {
 		emailAndPassword: {
 			enabled: true,
 		},
+		plugins: [
+			anonymous({
+				onLinkAccount: async ({ anonymousUser, newUser }) => {
+					const db = getDB(env);
+					// migrate like this
+					// await db
+					//   .update(playHistory)
+					//   .set({ userId: newUser.user.id })
+					//   .where(eq(playHistory.userId, anonymousUser.user.id));
+				},
+			}),
+		],
 	});
 	return auth;
 }
diff --git a/rr/app/lib/db/schema.ts b/rr/app/lib/db/schema.ts
index 1f962ed..c169b9f 100644
--- a/rr/app/lib/db/schema.ts
+++ b/rr/app/lib/db/schema.ts
@@ -1,19 +1,64 @@
+import { sql } from "drizzle-orm";
 import {
 	boolean,
+	check,
+	index,
 	integer,
+	pgEnum,
 	pgTable,
+	primaryKey,
+	serial,
 	text,
 	timestamp,
-	varchar,
 } from "drizzle-orm/pg-core";
 
-export const usersTable = pgTable("users", {
-	id: integer().primaryKey().generatedAlwaysAsIdentity(),
-	name: varchar({ length: 255 }).notNull(),
-	age: integer().notNull(),
-	email: varchar({ length: 255 }).notNull().unique(),
+export const haiyama = pgTable("haiyama", {
+	id: text("id").primaryKey(),
+});
+
+export const haiKindEnum = pgEnum("hai_kind", [
+	"manzu",
+	"pinzu",
+	"souzu",
+	"jihai",
+]);
+
+export const hai = pgTable("hai", {
+	id: serial("id").primaryKey(),
+	haiyamaId: text("haiyama_id")
+		.notNull()
+		.references(() => haiyama.id, { onDelete: "cascade" }),
+	kind: haiKindEnum("kind").notNull(), // "manzu" | "pinzu" | "souzu" | "jihai"
+	value: text("value").notNull(), // 1~9 or "ton" ~ "tyun"
+	order: integer("order").notNull(), // 0~17
+	index: integer("index").notNull(), // haiToIndex
 });
 
+// relation between user and haiyama
+// TODO: index
+export const kyoku = pgTable(
+	"kyoku",
+	{
+		userId: text("user_id")
+			.notNull()
+			.references(() => user.id, { onDelete: "cascade" }),
+		haiyamaId: text("haiyama_id")
+			.notNull()
+			.references(() => haiyama.id, { onDelete: "cascade" }),
+		didAgari: boolean("did_agari").notNull(),
+		agariJunme: integer("agari_junme"),
+	},
+	(table) => [
+		primaryKey({ columns: [table.userId, table.haiyamaId] }),
+		index("kyoku_user_id_idx").on(table.userId),
+		index("kyoku_haiyama_id_idx").on(table.haiyamaId),
+		check(
+			"agari_consistency",
+			sql`(${table.didAgari} = false) OR (${table.didAgari} = true AND ${table.agariJunme} IS NOT NULL)`,
+		),
+	],
+);
+
 // better-auth
 export const user = pgTable("user", {
 	id: text("id").primaryKey(),
@@ -26,6 +71,7 @@ export const user = pgTable("user", {
 		.defaultNow()
 		.$onUpdate(() => /* @__PURE__ */ new Date())
 		.notNull(),
+	isAnonymous: boolean("is_anonymous"),
 });
 
 export const session = pgTable("session", {
diff --git a/apps/shared/hai.ts b/rr/app/lib/hai.ts
similarity index 82%
rename from apps/shared/hai.ts
rename to rr/app/lib/hai.ts
index 0b17199..8e0026c 100644
--- a/apps/shared/hai.ts
+++ b/rr/app/lib/hai.ts
@@ -78,3 +78,22 @@ export function constructHai(kind: HaiKind, value: number | JihaiValue): Hai {
 export function sortTehai(haiArray: Hai[]): Hai[] {
 	return haiArray.sort((a, b) => haiToIndex(a) - haiToIndex(b));
 }
+
+// To store hai in DB
+export type DBHai = {
+	haiyamaId: string;
+	kind: HaiKind;
+	value: string;
+	order: number;
+	index: number;
+};
+
+export function haiToDBHai(hai: Hai, haiyamaId: string, order: number): DBHai {
+	return {
+		haiyamaId,
+		kind: hai.kind,
+		value: String(hai.value),
+		order,
+		index: haiToIndex(hai),
+	};
+}