The protagonist, who is looking for an apartment, accidentally opens a door to another world. There, he finds himself trapped in a huge, desolate building. It is a hellish place ruled by a certain monster, where neither going out nor dying is allowed!
Tomochika Izumi
Narumi Yonezawa
Mana Minamihisamatsu
Hihio Iwanaga
Narumi Michimoto
