Inran Sisters: As soon as he bought a small house on a loan, his wife died in an accident. His work wasn't going well either. But this unsuccessful father raised his two daughters on his own. That's what he's most proud of. The older sister is an office worker who is having an affair with her boss. The younger sister is worried because she can't finish sex with her boyfriend. An incident occurs to each of these sisters, and it leads to an unexpected development..