Plants are screaming everywhere in the world. While plants have become extinct due to environmental destruction, some have emerged that have a way of living by feeding on the nutrients of other creatures. Finally, I let a plant in a school with a swelling hatred and pain.

Yoko of the art club who has a faint love with Morimatsu of the soccer club. One day, when I heard a loud scream from the classroom and rushed to it, Yamada of the same club activity was killed. Since then, the identity of the criminal has been gradually revealed in a number of strange cases that occur around Yoko.