On The Seventh Day Of Daily Filling Her Four Years Older Big-breasted Mother-in-law With An Aphrodisiac, She Degenerates Into A Horny Female Who Craves Intimate And Intense Sex Over And Over Again. Saki Okuda

Father remarried, and his new mother was only four years older than Hajime. Living a new life with his young stepmother Saki, with her beautiful, big-breasted, still youthful body, Hajime was always lusting after her. Hajime, a university pharmacy student, mixed the drugs he obtained into an aphrodisiac and secretly administered it to Saki. After a few days, changes appeared in Saki's body... He couldn't stand wanting his young stepmother's body... Every day, he devoured Saki, who had turned into a crazed slut from the aphrodisiac.