Reina, a female teacher, decides to stay at home with Sakai, a male student who can't go home from school due to a sudden heavy rain. - She was planning to spend that day with her boyfriend, but she got into a fight with her boyfriend when she gave Sakai home. Sakai, who saw Reina's sad expression and huge breasts wet from the rain and transparent breasts, exploded with longing and sexual desire and attacked Reina. Reina struggles from the standpoint of being a teacher and a student, but she gradually accepts Sakai's single-mindedness and feelings for herself, and the two forget everything and devour each other like beasts.