Fumika lives with her mother and father-in-law. While living together, my father-in-law sees something that his daughter should not see, and becomes delusional, excited, and inferior. The father-in-law who has reached the limit of patience approaches Fumi in the bathroom that his wife can not see, touches the disliked daughter to get along with each other, and finally commits. However, the daughter was pleased with the woman's sexual intercourse with her father-in-law.