Izumi's grandson, whose parents were divorced and mother often traveled for work, had been taken care of by his grandmother Izumi for a long time. Because of this, even after becoming an adult, he remained a mama's boy... Unknowingly, these feelings turned into romantic emotions. One day, he accidentally witnessed Izumi masturbating, and his thoughts for his grandmother turned into lust and exploded. The young and erect penis was invited in by Izumi herself, who gently enveloped her grandson's penis…
