Ane Koi: Suki Kirai Daisuki

It's about a young man who has feelings for his older sister. He's in love with her, but she doesn't reciprocate his feelings. Sometimes he sees her sleeping and can't help but pay attention to the most attractive parts of her body. Perhaps he is constantly thinking about her figure, and young people at the university pay attention to her because of her appearance.

When he finally decides to talk about his feelings, a spark breaks out between them right in the hallway. Their relationship begins to develop, but the girl remains restrained until the last moment.