Amemiya Kie

This school has one rule: all conflicts are settled through a "trial." There’s no justice or equality—whoever loses is immediately marked for elimination.

In a mysterious school, there is a class where students with the lowest grades are sent, named the "isolated class". Akari, an ordinary female student, falls into the "isolated class" due to her friend's betrayal, where she is exposed to irrational senseless violence! However, she stands up to the members who dominate the class with an unyielding heart. At the same time, Akari joins forces with Yuto, another student who has fallen into the segregated class, and vows to climb out of this mess...

One day, the protagonist, Takuto Urashima, saves his classmate, Otohime Fujimiya, from being involved in a traffic accident, but dies and falls into hell. However, in hell, a "hostage exchange game" is being held, with a chance to come back to life... Participants are divided into two roles, master and slave, and each master is given one slave on the first playthrough. Luckily, Takuto is chosen to play the game as a master, but the person chosen to be Urashima's slave is his classmate, Otohime Fujimiya, whom he was supposed to have saved...!?