Being juniors in highschool now, Ninako, Ren and Andou are in the same class They're going to a field trip. Ninako, Ren, Ninako's friend Sayuri dan Ren's friend Yuutarou are in the same group. Ninako can't get closer to Ren because their relationship mow is "just friend"

Sayuri and Yuutarou, however, seem to have had something between them in their past. When they are alone, Yuutarou tells Sayuri... As pecial chapter about Sayuri and Yuutarou's middle school days ia also included.