r-o-o-k-i-e

A former student council president was raped and mind breaked by a fat otaku. After 5 years, the girl finally got her revenge by killing him even thou it also kill her. But she eventually found out that he has been reincarnated in to another world as a hero and now become a tyrant. Because of this, the god of that world assigned her a task to raise an army to defeat him.