My first house-sitting session with the lady next door

Yuu's parents go on a trip and he ends up staying home alone. Then Kiyomi, a neighbor who has been asked to take care of her, arrives. Yu feels happy and nervous to be able to spend time with the aunt she has admired since she was a child, but when Kiyomi's husband, Shigemichi, comes over, he devours Kiyomi's body at someone else's house. Yuu, who had seen what the two were doing, couldn't sleep even at night, and finally made up his mind and headed to the room where Kiyomi was sleeping.