His father had remarried and his new mother was only 4 years older than Hajime. Hajime was always lusting for her new life with her young mother-in-law Saki. Hajime, who attends the university's pharmacy department, mixes the ● thing she got and secretly administers it to Saki as her aphrodisiac. After a few days, changes appeared in her Saki's body. I'm dying to have her young mother-in-law's body ... I sucked Saki every day, who turned into a gangimari horny woman with an aphrodisiac.