Sakura Ichitarou is a student at a coeducational boarding school, friends with his classmate Shizuka Morifuji. During a baseball game, Sakura dives to catch a hit ball; this action causes Shizuka to suddenly notice Sakura's "sheer beauty," shifting their relationship.

Characterized by an "innocent-minded" nature, Sakura doesn't dismiss Shizuka's joking suggestion of a kiss. Instead, he insists they actually kiss under the night sky. Following this, Sakura exhibits less hesitation or internal conflict than Shizuka, who attempts to create distance. Sakura's straightforward reaction to the kiss and the resulting tension contrasts with Shizuka's need for space to process his feelings.

The narrative centers on their evolving relationship as they navigate misunderstandings and conflicting emotions stemming from this event. Sakura's role is defined by his involvement in this central dynamic and the exploration of mutual feelings between them.