YST-317 - The mother, who remarried my respected father and is younger than him, was a cruel person who controlled ejaculation. Hamazaki Mao.

Recently, a son has become afraid to face his stepmother, who has become a new member of the family. She violently strikes his penis whenever she has time, repeatedly stopping and starting, enjoying seeing his face in agony. Furthermore, she forbids him from masturbating, forcing him to make an unreasonable promise to 'only ejaculate in front of his stepmother.' On this day, after being thoroughly tormented, he is flustered by her riding him and treating his penis like a tool with violent hip movements, and finally receives permission to ejaculate, pouring a large amount of semen deep into her vagina.