Death Count

Reina Eden, a seemingly normal girl, gets chosen to take on the role as a Death Changer, a role she hasn't even heard of in her life. With only the knowledge given to her in one night by her predecessor before he dies, she's left to figure out everything on her own with the lives of many people on her hands.

[this is a mediocre-at-most story i started writing a long time ago and forgot about lol]