Yandere Battle of demons x Oc

Mi-sun is a beautiful sweet girl who was born in a world where there are demons who could either make you there bride and putting there mark on you or use you, and for Mi-sun she is the bride of a scary demon Hibiki when she saw him injured and passed out and helped him and he then saw that he wanted her and craved her and to everyone else he's nothing but cruel and hate humans but when he's with Mi-Sun he's very caring and gentle. But he's really overprotective and doesn't let her go to school where he goes because of other demons at the school especially the king of demons.Hibiki hates him with a burning passion and will not let what's his get taken away but what happens when Hibiki forgets something and Mi-Sun decides to bring it to him at school even though he's told her to never go there but she wanted to be a good bride and give it to him but then some things didn't turn out the way they planned.

Warning: I don't own anything and there will be swearing and sexual content