Koishi Herikawa

Height: 154 cm Koishi is one of Kei's closest friends who also pursues a romantic relationship with him, but discovers her affection for one of her teachers, Yamada. This inappropriate relationship is only ever hinted at, but it's more than obvious that something is going on between them when Yamada is confronted by the principal about him seeing Yamada and a girl from their school walking together. Her parents own a grocery store and she often has to go to deliver food that people ordered. Koishi has a happy-disp…