The main heroine is married to her cousin, Tomaki, whose also her childhood friend. Even after they married she still lived alone in her apartment, so one day she decided to move into her husband’s apartment, she thought that she will get a happy lovely life with her husband. She was thinking to giving a surprise to her husband, but when she arrived at her husband’s apartment, she had realized that her old acquaintance also lived in her husband’s apartment. Everytime Tomaki leaves mc alone with the irrelevant guy, she had to face a big storm before her. Feeling extreme guilt towards her husband as she continues felt great pleasure from that guy.