Mr. Mamiya teaches at an all-boys school, and he has a secret. The first time that he had a class as a homeroom teacher, one of his students had professed his love for him. Three years later, Haruma Seta appears in front of him. He's matured, he's become a trainee teacher, and he continues to tell Mr. Mamiya that he loves him. Will Mr. Mamiya be able to resist Haruma's approaches...?