After Retiring as the White Moonlight

After Shiyong Yuyue died, he was bound to a White Moonlight System. The System required him to transmigrate to various worlds and become the [protagonists'] white moonlight. Once he completed his missions, it promised him an ordinary, happy life of his choosing. [Being someone's white moonlight means giving your whole heart to the person you protect and nourishing them with sincerity. Wait for the branches to sprout and bear sweet fruit, then let them pick it.] Shiyong Yuyue did as he was told. At the orphanage, he carefully looked after the kind-hearted Russian rice ball, then joined the Port Mafia early to compete for an executive position. As his standing in the Port Mafia steadily rose, Shiyong Yuyue eventually witnessed the changeover from the old boss to the new, and his own downfall. As a member of a European intelligence organization, he infiltrated the Black Organization on a mission. Not long after, Shiyong Yuyue pressed the gun of a silver-haired man to his own forehead and smiled gently. "Pull the trigger, and you'll be the organization's Top Killer." After that, they never met again. Even the nights in Meteor City could be lit by a faint but gentle lamp. A child with an inverted cross branded on his soul tugged at his sleeve, drawing him toward lands he had never set foot in. "People are not born superior or inferior. The life you want is yours alone to take charge of." After taking care of everything, Shiyong Yuyue arrived at a new world full of anticipation, finally ready to live the life he wanted. As planned, he got into the police academy. Following the usual path, he would become an honorable police officer. But... The well-mannered information broker from the Rats in the House of the Dead came to call, whispering in his ear like a lover: "Want me to collect your body again? Or is this your own special kind of romance with me?" The silver-haired killer cornered him, anger rising in his emerald eyes as he rasped with a mocking smile: "Why are you avoiding me? You weren't so timid when you held my hand back then." While investigating a case, he ran into a former student. The man, once a thief, seized his wrist, his tone tinged with amusement. "Too bad. This time, you won't be able to escape me." Faced with a mountain of old emotional debts from his past, Shiyong Yuyue cowered behind the door and sighed, covering his face. So much for the peaceful life I was promised! This is a battlefield of love, all right!!! [Reader's Guide] 1. Everyone dotes on the male lead. He's a kind, gentle man with principles, a natural lady-killer aura, and a thing for white-haired men (?). 2. The endgame pairing is undecided. There will be several romances along the way, one after another. But the story will definitely end with a natural 1v1 pairing. 3. The male lead longs for an ordinary life in the truest sense and works hard to keep living. He's a good person who sincerely cared for all the kids he raised. 4. Lots of headcanon. I'm a sucker for melodrama and all the fun tropes. Theme: When you love the world, the world will love you back.