A particular summer day, when Arashi is finally revived back, Hajime must find a solution to his cherry bomb, summer school project. However, on the way to the Ark, Arashi decides to change the name of the bomb to "Cutie Cherry Chan" bomb. Embarrassed by the name, Hajime implicitly opposes it, however Arashi has her way in the end and changes the name. Upon arrival to the Ark, they place the "Cutie Cherry Chan" on a small plate, satisfied with the way it looks. Hearing a female's voice calling out "Akagi Keiichiro," Hajime turns to where the voice came from and comes face to face with...