High School Hack and Slash

Touma Funasaka is recommended by his homeroom teacher to attend Toyashihara Academy, a national full-boarding school that only admits students through recommendation. The school is where his teacher once studied and offers low tuition with full-boarding. Seeing it as a good opportunity, Touma enrolls. However, the academy is unlike anything he expected. Built over a large underground dungeon, it operates under a chaotic system dominated by sex and violence. Initially confused, Touma soon adjusts to the bizarre environment. As he experiences a life filled with excess and indulgence, he also begins forming a group with others to explore the dungeon below.