Sozen Kurosawa is saved by a stranger after nearly drowning. He was unable to see his saviour’s face, nor could he thank them. All he remembers is their voice.

After getting hit by a ball during PE, Sozen is sent to medical to get checked up on. That’s when he meets the new school nurse, Riho Takanashi, who has a familiar aura about her. After hitting it off with her, the two began to have regular meetings. But when Sensei begins to develop feelings towards him, how will he reply? Can a student and a teacher be as close as they are?