My stepfather's wife is teasing me about my stepfather. Please forgive me now...

His stepfather, Hirozo, is diagnosed with alcoholism, so his wife Yuko lives with her husband Koichi and takes care of him. The next morning, after Koichi went to work, Hirozo began drinking again. "No! Don't drink!" Hirozo, who has been in a fight with Yuko, takes up the alcohol, ends up raping Yuko in a lame way. No matter how forced she was, the abominable fact that she had a physical relationship with her stepfather has caused Yuko torment...