Yumi, a married woman, inherited an apartment managed by her parents and now works as a landlord and caretaker. She is caring and has a good reputation among the residents, but sometimes she gets too involved and goes beyond the relationship of landlord and tenant. One day, a resident, Motoya, comes to her for advice about his love troubles... When she hears his story, she learns that he doesn't have the courage to confess his feelings because his penis is small. Wanting to cheer him up somehow, Yumi suddenly takes off Motoya's pants and starts sucking his exposed penis...