My daily life changed completely after that day. Hayato, her childhood friend, comes to visit her husband, whom she adores as ``her older brother'', at most three times a week. However, Hayato's true intentions were different. It was to meet Misaki, the person she has feelings for. Unaware of Hayato's feelings for her, Misaki casually asks, ``Do you have a girlfriend...?'' The situation suddenly begins to move.