Sakura and Reiko, married women who live in the same company housing, hit it off immediately when they met and built a lesbian relationship despite both being married. They made love almost every day in the afternoon when their husbands were not around. However, one day, Reiko became worried that the distance between her and Sakura was gradually growing. Yukari, a married woman who was jealous of their relationship, confronted Sakura. Before she knew it, that anxiety turned to jealousy, and their relationship was about to come to an end...