A virgin brother who really wants to have sex with his big-breasted older sister, Mei. - He sets up hidden cameras throughout the house and approaches his sister...She forgives him, saying, ``If it's just a kiss...'' - Unbeknownst to her, this was the reason for the breakdown in the relationship between her siblings. - The younger brother, who can't resist just kissing, seeks his sister's body and asks her to fuck him again. - Mei, who cannot refuse, accepts her younger brother's dick raw. - From that day on, an incestuous life that I couldn't tell my parents started. - Gradually, Mei's body also desires her younger brother's dick.