“ATSU……”

Yoichi Tokizaki, the protagonist of the story, has a broken air conditioner in his room just as the summer is about to start. It seems to take a long time to repair it, and he is at a loss for what to do. When he is at his wits end, his childhood friend Misora Saku, who is staying in the next room, makes an unexpected suggestion.

He said, “You know what? Our room has a sliding door, right? 　If we open that door, it will be cooler.

Now that their rooms are connected, they are aware of each other. What will happen to their love ……?