I will be a demon in this life!

Intro: Stan Miller, an 18-year-old student, transmigrated into the body of Mart Sevec, a 17-year-old demon who was studying at the Danterior Academy, in a world in which demons and humans were at constant war.“Demon women are beautiful, I guess I could give it a try. Is there anything wrong with being a demon?” thought Marc a few minutes after seeing the new world he had to live in.[Demonic System Activated][Host Mart Sevec (Stan Miller)]