Hinata Tachibana and her husband want to have sex, but because her husband is busy, they can't do it often. After her husband leaves for work, her father-in-law suddenly visits. Hearing their conversation, her father-in-law says, "Are you having sexless sex?" and shows his d*ck. Hinata, who hates her father-in-law, angrily rejects him and throws him out of the house. However, she can't forget her father-in-law's huge d*ck and masturbates while remembering it. She believes that Shinji will be her partner on the holiday tomorrow....