diff --git a/orm.py b/orm.py
new file mode 100644
index 0000000..412d324
--- /dev/null
+++ b/orm.py
@@ -0,0 +1,13 @@
+from tortoise import Model, fields
+
+
+class User(Model):
+    id = fields.IntField(pk=True)
+    name = fields.CharField(max_length=60)
+    state = fields.CharField(max_length=20)
+
+
+class UserGroup(Model):
+    id = fields.IntField(pk=True)
+    name = fields.CharField(max_length=60)
+    user = fields.ForeignKeyField('orm.User')