Hotaro, a typical company animal who works at a black company, buys a lunch box at a convenience store after work, eats, sleeps, and spends his days at work again. One Friday night, I was exhausted and bought a lunch box at my usual convenience store and ate it on the bench ... various things got crowded and I cried. "It's hard enough to cry." But the older sister of the usual convenience store clerk appeared there. For some reason, I was invited to the house by Hiyoko, a silent and slightly flashy-looking older sister ... Hotaro (virgin) can take a bath because she can get rid of fatigue for some reason. However, instead of getting tired, Ms. Hiyoko began to press her chest against Hotaro's lower body......!? And from that day on, the number of words is small, but the strange sex of Ms. Hiyoko and Hotaro comforting Hotaro's body (!?) The relationship has begun......!?