Kosaki assumes she is gaining weight after checking their scale and prevents herself from eating excessively which proves to be difficult for her. Noticing Kosaki's adversity, Raku tries to present her with her favorite treat but Kosaki storms off. In the end, Raku advises Kosaki to have a proper diet due to her slender figure. Meanwhile, Haru discovers that their scale is defective. As middle-schoolers, Kosaki and Raku were classmates with the former being in love with the latter. In her pursuit of love, Kosaki tries hard to enroll in the same school as Raku but ends up failing in the entrance exams, much to her depression. Whilst being together with Raku, Kosaki receives news that she actually passed the test as she looks forward to interacting with Raku again.