The Kid Who Got Powers From A Demon

problems

So there was a kid who was hated at his school. But one girl liked him she wanted to help him somehow but the girl was to shy .(the boy name was john and the girl name was Grace .)
One day grace saw john cutting himself so she ran over to him and said angrily " stop!!!!" And she grabs the knife . she ask him "come with me after school " and he did so she took him to her house . john was a little scared because her house looks old and creepy . grace knocked out john and drag him into her room .she made him into a half demon and said "you will be stronger. "