The stepfather suddenly came over due to a marital quarrel, and it was fine that he stayed for a few days. However, the stepfather found out about Manami's sexual frustration. So, the stepfather pretended to be his wife and approached Manami, who, being sexually frustrated, also impersonated her stepmother and enjoyed sex. Midway through, she realized it was the stepfather's scheme but couldn't back out and ended up with semen injected inside her. Since then, she has been at the mercy of her stepfather's demands, her body being devoured.
