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)]

Mart entered the restricted library after having walked through the corridors a few times and corroborating that there was no sign that chaos was about to start in the Academy, even so he did not feel as calm as before, especially because he had seen the haste with which the Arcariz family liked to act. In the end, after politely asking the green-haired, bespectacled student for the books he had left at the reception desk, Mart sat down at the desk he usually used and opened the book "demonic hearts" once again, after which he began to read:


Chapter 63 - Chapter 63