Yuhi's mother died at an early age. Her uncle Ippei moved in with her father and daughter, switching shifts to night shifts so that she could take care of her. Only, this uncle taught Yuhi the wrong sex. He told her that it was normal to be naked, bathe, or sleep together among family members, and that it was not allowed to talk about it with others. As a result, he took advantage of his niece to satisfy his sexual desire! When Yuhi told her neighbor, she found out that what she was doing was completely wrong! Yuhi wanted to stop this, but her uncle wouldn't give it, and he still forced her to sexually satisfy him. However, when she was not allowed to have sex, Yuhi felt her body tingling, extremely uncomfortable. She ignored what others thought, continued her previous lifestyle, still bathed with her uncle and let him have sex with her to her heart's content...