Jigoku no Ashita

A high school student named Ashita experiences a heartbreak that causes him to fall down a staircase. After waking up, he is in the arms of a woman named Gasha on a boat traveling to the afterlife. At her request, he tours Hell and later enrolls in a demon school where Gasha is the headmaster. Surrounded by demons driven by their desires, he faces a school life marked by inevitable violence.