SSIS-699 — On The Seventh Day Of Giving My Busty Stepmother, Who Is Four Years Older Than Me, An Aphrodisiac Every Day, She Became A Horny Female Who Wanted To Have Incestuous Sex Over And Over Again. Okuda Saki

His father remarried and his new mother was only four years older than Hajime. Hajime's new life with his young stepmother Saki always made him lust after her beautiful, busty, and youthful body. Hajime, who is studying at the pharmacy department of a university, secretly gives Saki an aphrodisiac by compounding some substances he has obtained. After a few days, changes begin to appear in Saki's body... He can't help but crave his young stepmother's body... Saki has become a slutty woman who is high on the aphrodisiac, and he devours her every day.