One summer day, the Enjo family's precious air conditioner broke down. Unfortunately, the father was away on a business trip, and it was already lonely, but the heat was also a problem... Hitomi, the mother, felt that she had to take care of the house while she was away, so she worked hard, sweating profusely as she did the housework to try to ease the loneliness. The son, who was watching his mother like that, couldn't stop thinking about his mother's breasts, which were drenched in sweat, and visited his mother's bedroom in the middle of the night...