The Hashimoto family is moving to a new apartment after getting married. However, when he greets them after moving in, he can't stop thinking about the seductive smile of Sumire, the wife of the Kurokawa family who lives in the same apartment building... One day, when he goes to the garbage dump before work, he ends up alone with Sumire! Hashimoto, who has seen through his hidden feelings, is carried away and cums inside her. From then on, he is drowning in Sumire's temptations in all places, day and night, and his days of cumming inside her begin...