This story takes place 1000 years before the Dream arc. Kanna is a girl with wings confined to a palace with a friend, Uraha, and body guard, Ryūya. When Kanna is to be sent to another temple, the 3 escape and go on a journey to find Kanna's mother. Meanwhile, the palace is attacked and the 3 are pursued. They finally find Kanna's mother but she tells them to leave.

The events of the Summer arc are retold from the escape from the shrine to before the mountain. These events also include scenes not shown in the original Summer arc.