We live in a time when people are refraining from going out unless it is necessary or urgent. - Yuya, who runs a used car sales company, has a hard time going home because he has to meet many people. - Yuya's wife, Himari, is not home without her husband and is unable to go out, and Yuya's stepchild, Atsushi, is living like a NEET, and is fed up with the stress of staying at home. - One day, Yuya has to leave home for a long time to go on a business trip to the next prefecture, but... - By an unexpected coincidence, the mother-in-law and son, who are close in age, end up in a closed-door room for two months, devouring each other's bodies like beasts, covered in the smell of sweat, semen, and love juices.