The divorced man next door is always helping, whether cleaning the entryway or carrying packages. When Miku falls ill while her husband is away on a long business assignment, he brings her meals and looks after her. Drawn to his kindness and taking advantage of her husband's absence, she repays the innocent neighbor by seducing him into an affair. His inexperience stirs her maternal instincts, so she teases him further with obscene costumes and enjoys their secret encounters.