Luke as a child loved his mother. She may have been a human but she always been there for him and took care him. When he enter Jr. High rumors begin to spread about his mom, as one to protect mother honor he begin to fight people that talk bad about Nana. This lead to him being in trouble and even worst badly hurt. Luke started to learn magic and training in the powers of sun and moon. The mix beliefs cus him to start to glow. Luck magic reflects the powers he learn.
Once in high school people fear him and not talk shit about his mother. He even though always looking upset was starting to enjoy an normal life, that was till he found out the truth about his mother and worst....she been spying on him. Looks like son have to train mommy to be a good girl now.