Killing Curriculum: Jinroh Shokei Game - Prologue

Prequel of Jinroh Shokei Game. High school student Niina is kidnapped on his way home and wakes up in a unknown place with former classmates and a teacher. The group is forced to participate in a deadly and sadistic game known as "The Werewolf Game".
Niina will form a deep bond with Sakiguchi, a former classmate who soon confesses his love for Niina and vows to protect him. However, it soon becomes apparent that Sakiguchi is not who he claims to be.