Jōji Ema is a student at an all-boys school. Following the school's athletic festival, his classmate Miyoshi Hayashi exhibits unexpected behavior toward him. This involves Hayashi directly approaching Ema and initiating surprising interactions.

Ema provides a grounded counterbalance to Hayashi's eccentric personality. Their relationship evolves through conversations where Hayashi's unconventional actions draw reactions from Ema. Ema navigates Hayashi's unpredictable conduct while continuing his ordinary student life.

The narrative focuses exclusively on Ema's school interactions and his responses to Hayashi's behavior. Information regarding Ema's family, background, appearance, hobbies, or life outside school remains outside the documented events. His development centers entirely on this dynamic.