Yuta spends his summer vacation studying closely with his enticing cousin Kei, whose big boobs and flirtatious ways make concentration impossible amid their incestuous household. Her teasing sparks their virgin desires unexpectedly, leading the pair to cross the line and spend their time studying each other in sensual ways. They then work to reconcile their feelings after the passionate shift in this hentai episode, where creampie moments heighten the forbidden thrill they now share.