Eishi Karasuma is a loner with a monotone life with his only friend is Mikisada Komoda. While skipping class they met Tsubame, a very energetic girl and Rei Sagisawa, a boy that attend the same middle school. On their way back, Eishi and Mikisada take a bus which plummets from cliff. In order so survive they have to make a contract with the mysterious Birdman… what does their future entail? **Officially published:** - In french by Vega - In indonesian by Elex Media Komputindo