Kouichi Aihara, a high schooler in class 2-A, moves through five separate storylines, each volume built around his growing relationship with a different classmate. Adapted from Enterbrain's KimiKiss dating-sim game, the manga treats every arc as its own contained romance, letting readers see Kouichi's dynamic shift completely depending on which girl the story follows. The same game went on to spawn several other KimiKiss manga and a separate anime series.