You were on the Mugen Train about to head to the entertainment district when all of a sudden the lights started to flicker, and people started to fall in a dream like state

You were a demon slayer, so you knew not to panic as much, so you took out your sword and waited for something

A demon then appeared in front of you with the mark of a lowermoon, specifically lower one on his eye

Enmu: "Oh my~ look at you, You poor little helpless demon slayer...~ It's a shame I'll have to kill you~"