The father's remarriage partner, Eri. (Why is such a great woman with our old man...) Son Shinichi started to notice Eri as the opposite sex from a certain period. But something happened that seemed to toy with Shinichi's intentions. Eri was bringing men into the house and having affairs while the family was out. Shinichi, who accidentally witnessed the scene, felt anger welling up inside him at the same time as he had base thoughts flashing through his mind...
