aina was asked by her husband's best friend, kimura, to pretend to be his girlfriend while lying to their parents about being engaged. at first, she agreed because she found it amusing to see her husband jealous, but as they went on dates to create an alibi through photo shoots, she began to see kimura as a man. one day, when introduced to kimura's parents, she kissed him to prove they were dating, but felt sensations she never had with her husband.