Main Characters Shiki Koshiyama 12 main appearances Mari Fukami 12 main appearances Chisato Mikuriya 12 main appearances Gakuto Sasajima 12 main appearances Jinko Sasajima 12 main appearances Akira Sonohara 12 main appearances Daisuke Inoue 12 main appearances Takumi Niina 12 main appearances Yōsuke Ashiya 12 main appearances