Smile (Manhwa)

young-woo is on the verge of leaving his company after completing his final mission to eliminate a drug dealer.just as he is about to board a smuggling ship to china, he hears the news of his mother's death, who he lost contact with 20 years ago. there, he discovers he has a half-sister with the same name, young-woo!meanwhile, the organization, realizing young-woo is still alive, tries to eliminate him and find his sister..