Hisae and Sara are such good friends that they are always together, no matter where they are. Although they are senior and junior at work, today the two of them come to work happily, chatting away about trivial things. They thought that their days would continue like this forever... But one day, Hisae is called out to the rooftop again, where Sara confesses that she has a new boyfriend. Although Hisae congratulates her at first, she cannot bear the loneliness of seeing her cute friend Sara leave her, and she begins to desire Sara's beautiful body...