Natsuno became homeless after his breakup with his girlfriend and had no choice but to stay at work each night. However, he was able to reconnect with his old schoolmate, Ui, who had once professed their love to him. Unfortunately, Natsuno had rejected Ui, and they lost contact. At a mutual friend's wedding, Natsuno found out that Ui had memory loss from an accident. Natsuno took advantage of the situation by pretending to be Ui's ex-partner to win their favor and have a temporary place to stay.