That door definitely leads to the human world.
Maybe Iruma was drawn to the key because he is also a human and maybe link to his original or maybe he is possibly a descendant of Delkira and having the same impulses as him.
My theory is that Iruma might he part-human and part-demon. His family is part of a secret clan where they are all part-human and part-demon that are linked to Delkira. His parents escaped with young Iruma because their clan leader found out that Iruma has the strongest or closest link to Delkira from observing him during his toddler age. With that problem, his parents are always on the run. They summon Sullivan and "sell" him to protect him their clan leader.
Well that is just my big theory. From just linking him to The Misfits, Iruma might be someone that is part of something bigger in the human world and not just a regular human. And there is great power in him that's just waiting to come out. With proper guidance from the school and his natural human values. He is bound to turn and change the demon world.
it could be that iruma's parents neglected him to expose the hardship he's about to face at netherworld. and then they "sold" him to sullivan. sullivan probably alr expected it bec delkira more or less hinted him about his descendant being someone from the human world. idk it sounds plausible, especially when there's a scene where delkira said "so you're the one/so it's you" . that's probably a hint that iruma might be related to delkira. also the delkira's crest on iruma's stats data? i don't really remember but it's something like that.
it could be that iruma's parents neglected him to expose the hardship he's about to face at netherworld. and then they "sold" him to sullivan. sullivan probably alr expected it bec delkira more or less hinted him about his descendant being someone from the human world. idk it sounds plausible, especially when there's a scene where delkira suddenly appeared for a moment and said "so you're the one/so it's you" towards iruma. that's probably a hint that iruma might be related to delkira. also the delkira's crest on iruma's stats data? i don't really remember but it's something like that.
I think things are gonna be messy after this chapter. Idk. I feel like Baal and Kirio might have plans to make this Battler Party end in chaos.
Maybe this will the time that weapon that Baal asked Sylvia's and Sabro's father to create will be used. So that their father can witness what kind of destruction it can do with them there.
Or maybe not. Idk. Maybe too soon for that weapon or maybe it'll never be seen again.
It's just it wont be smooth sailing after this. Thats why Bachiko and Mephisto are there. Something big is gonna happen. It might gonna prevent Iruma from ranking but not his other battler members.





I fcking knew it!!! That place was a place between the two worlds.
I think Ali-san was caged in the ring since magic can't be used in the place he was released.
ALSOOOO
Maybe that's a place where Henri and Ameri's mom used to go as a place to relax. Maybe one day she accidentally went to the human and was captured by shamans or something.
Just a thought though.
DAAAAAAMMMNN
Can't wait for the next chapter!!!