"Izumi Ako" and "Izumi Komachi" are twin sisters. When Komachi learns that Ako has feelings for "Oosawa Maki" sensei, she confesses to Maki on her way home. Ako rejects Komachi, who happily shares the story. Their hearts become misaligned, and they remove their matching ribbons. The next day, their childhood friend "Uesaka Yuki" worries about them, while Ako is invited by Maki to come to her apartment... A twisted sisterly love. A juvenile story that re-establishes the bond of twins, completed.