Ayame, a housewife who lived happily with her husband and three sons who are college students. One hot summer day, the air conditioner broke and it took several days to repair. Her husband is on a business trip the next day, so Ayame has to sleep in her son's air-conditioned room until he gets better. However, her son, who was watching her mother masturbate during the day, exploded her suppressed lust and raped her sleeping mother in her room. Ayame gradually fell for the pleasures of her son Ji Po, even though she knew that she was naughty.
