Kirino Miune is an ordinary office worker who wants to find love, but is plagued by a stalker and spends her days in an unusual way. One day, she happens to ask her boss, Kai Yamashina, whom she admires, about her problems. Umi made a bold proposal: "I'll be your boyfriend and bodyguard!" Miune decides to pretend to be her boyfriend, but she can't hide her upset at the true nature of Kai that is gradually revealed to her...?