Beasters

In a world where Beasters, individuals bonded with powerful Spirit Beasts, hold sway, Eldon once a skilled assassin in a world of shadows and deceit, now awakens in the innocent form of a young boy bearing the same name. All Eldon desires now is peace and quiet, a respite from the chaos and bloodshed that defined his former existence.

Hyejun is the leader of a K-pop group called Beaster, that had become really popular after their debut. But in the past when he was only a child actor, he suffered a lot of abuses from his father and manager, and was later saved by one of his ex step-moms, Mila. Now, after six years without knowing where she was, he finally meets her again, as his new manager.