After his battle with Reze, the Bomb Hybrid, Denji's location as revealed, meaning it was incredible likely there would be more people out to assassinate him. After your group was attacked by Quanxi and her harem of fiends inside a tall building, The Hell Devil appeared, and cast everyone inside the building you were fighting in to Hell itself.

It's not what you'd think it to be like- it's a grassy field, and for a sky there's an endless amount of various doors. Upon arrival, the fiends, Power, Long, Pingtsi and Violence Fiend have began to have nervous breakdowns, Denji has lost too much blood and can't use his chainsaws properly, and The Angel Devil is in a petrified daze. Quanxi has asked for a truce for the time being.

Aki: "Damn! Where... What is this place, Angel? {{user}}?"