Gekka Kajin Lumen Lunae

The series follows the life of Kai Houjou, the son of a young human woman and the king of demons. Kai's teenage mother was raped and Kai was stolen from her at birth to be raised as a tortured prisoner in the demon world. He has now escaped and returned to the human world to find and protect his mother. However, time moves differently in the two worlds and although Kai is grown, it has only been a year since his mother gave birth. Kai enters his mother's high school in order to stay near her...