Reira, who married her college friend Kenji, has always lived a happy life as a devoted wife. But one day, she reunites with her former best friend, Oki, who has since become an entrepreneur and opened an office nearby. Posing as support for her husband's happiness, Reira is asked to assist Oki with his unstable business venture—unaware that she and Oki were once lovers. In stark contrast to her gentle, warm-hearted husband, Oki exudes a wild, forceful charm that begins to stir Reira's emotions all over again. Caught in a whirlwind of conflicting feelings, where does Reira truly belong?