Born female but identifying as male, Shima drifts through school alone, only finding comfort in venting to café owner Runa, a transgender woman who understands him in a way no one else can. After a tragic accident, Shima awakens in Runa’s body in 1999, back when Runa was still living as a teenage boy. Now in a male body, Shima must face the intense sexual awakening of a teenage boy, all while navigating his own identity and relationships.