Been a while but read a few chapters but the main character has demon blood and his father might be the demon lord but doesn't know much about him. He just learned about having demon blood and is trained by friends to control it. He can manipulate people to a certain extent but has to get their trust or some trust. He is a high schooler and one of the demons helping him is about same age as him. For final test he has to claim his mother when he gets stronger. There are also other demons who will go after him if they smell him due to his blood from his father.