Gate to Hell

Ordinary high school students are accidentally summoned to the sanctuary and involved in a cruel war? Is the history behind Hell's Gate really true? Who is the justice, the Holy Army who serves as the guardian and the demons who hope to break out of the prison and yearn for freedom? Is the opening of the gate to hell really just an accident? What is the purpose behind the scenes? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.