The story begins with me, a boy with infinite sexual desire who masturbates until his ●ock is exhausted, starting to live with my stepmother, who has the aura of a former party girl, my father's remarriage partner. One day, hearing strange noises from the second floor, my stepmother peeks and finds her stepson masturbating. The former party girl stepmother, genuinely worried about her stepson who doesn't seem to tire no matter how many times he ejaculates, decides to help out by saying, 'If it's with the mouth, it's not cheating…' and takes off her panties to save the sexual desire monster. AIKA's lewdness was fully displayed in the first half, which was shot in an easy-to-understand manner, but scenes like those in the bedroom were somewhat disappointing due to poor lighting. Watching AIKA after a long time, some didn't like her strangely dyed short hair. However, her body remains as attractive as ever, and it's surprising how she maintains her youthful appearance almost unchanged after years in the industry.