The Beautiful Ceo's Bodyguard Was Once the Number One in the World

Xiao Chen, the former world's number one killer and the master of the secret guard hall of the Dragon Soul Organization, resolutely planned a fake death in which a golden cicada escapes from its shell in order to fulfill his promise to his deceased relatives. He gave up all his glory and identity just to return to his hometown after fifteen years of absence and take care of his lonely little sister whom he had never met. In order to give his sister a stable home, this legend who once made the world's bosses frightened chose to hide in the city and become the personal bodyguard of a beautiful CEO. He restrained his sharp edge, tried to integrate into ordinary daily life, and guarded the hard-won warmth. However, the tree wants to be still but the wind does not stop. The grudges of the past have not been resolved, and real crises are coming one after another. Facing the approaching threat, in order to protect those around him, the hidden Dragon King will eventually reveal his fangs again. When the identity of the hidden killer is revealed, the peaceful life becomes turbulent again. As his horrifying past is gradually exposed, the whole world will tremble for this king who returns to the city.