Dark Old Demon

Roy's life was nothing special. The only thing commendable was the last few moments when he saved a mother and her child from a drunk driver.
...
It's really an egg! Damn it, what kind of monster have I become? Did I fall into Hell instead of making it to Heaven??
Join Roy as he ventures through various worlds with the Custom Made Demon King System—a system that allows Roy to draw anything he can imagine and create it through exchanging souls!

Custom Made Demon King

While Roy was still guessing, the words Uriel heard in her memory came, finally unveiling the mystery of this Archangel.

This Archangel's sudden fierce tone shocked Uriel greatly. It seemed like she originally planned to jump out and get close to her idol, but this Archangel's tone immediately dispelled this idea, and she instead drew back and hid.

Facing this question, Archangel Gabriel did not have much reaction and only said calmly, "Michael, I have already decided!"

Hearing this name, Roy finally realized that the Archangel standing opposite Gabriel was Michael!

Secret of Heaven