My father remarried and my new stepmother Hajime was only four years older than me. Living with my young stepmother Saki, Hajime always felt lust towards her, beautiful with large breasts and a youthful body. Hajime, a student at the university's pharmacy department, secretly mixed and administered a procured substance as a love potion to Saki. After a few days, changes appeared in Saki's body... Desperately wanting her young stepmother's physique... Every day, he thoroughly enjoyed Saki, who had transformed into a wildly promiscuous woman with the potion.
