A son's eugenics who doesn't like Mako, who became a new mother after his father remarried. One day, Yusei forcibly violates her Mako, takes a picture of her with a smartphone, and uses it to threaten her Mako and train her into a fucking sex slave. The training of eugenics escalates, and while her father is away, she restrains her Mako with DQN's seniors, makes her cum with electric massagers and vibes, and further commits her Mako's big boobs with her big cock seniors. Mako gradually went crazy.
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