Mu Man is a monster, Mu Man's brother is also a monster, Mu Man's friends are also monsters, and Mu Man's subordinates are still monsters.
Mu Man always kept people and demons very separate. Humans were outsiders and demons were insiders.
However, one day, Mu Man fell in love with a demon who only regarded her as a human being, and fell in love with a demon who already had a sweetheart. She couldn't break away or escape.
In the turbulent time of the demon world, how to protect the people you care about, and your heart is getting hurt little by little. Mu Man, who is getting harder and harder, stands on the opposite side of the one you love and says: I don't love you anymore, don't use me.
The demon has a heart.