[Crossover] Character Collection System

Serial next door: "After Being Switched at Birth, He Became the Villain [Book Transmigration]" by Louxia Youren. If you're interested, search the title or author's name to bookmark it~ Blurb: The little madman Lin Mu transmigrates into the young master of a wealthy family in a novel. The original was switched at birth and grew up with a nasty, troublemaking personality. After being brought back to his wealthy family, he immediately turns the tables and constantly picks on Yuan Qinghao, the real male lead who was raised as the fake young master. Lin Mu: "...How boring." He thought he was just a minor character. After transmigrating, he took the initiative to make peace and tried to get on the male lead's good side. But as he kept cozying up to him, he discovered that he was actually the book's main villain? Was being brought back to the wealthy family his own plan? Was his arrogant, domineering personality an act? Was he the one who caused the male lead's childhood trauma? Lin Mu: "...Now this is exciting!" Lin Mu went off the deep end. He decided to bind the male lead to him with love before the truth came out! When Yuan Qinghao wanted to fight for the family fortune, he helped clear the obstacles in his way; When Yuan Qinghao wanted to enter high society, he built him a ladder to climb; When Yuan Qinghao wanted to pursue the young lady next door, he... helped out a little, then made a few small moves behind the scenes; At last, Yuan Qinghao couldn't take it anymore and cornered him against the wall. "Tell me, are you hiding some ulterior motive?" Lin Mu smiled happily. "That's right! I've got my eye on you!" Yuan Qinghao: "...Great. Then let's get married right away!" Lin Mu: ??? I meant to bind you with love, but I never realized I had already stepped into the trap of love you'd laid for me. [Note:] A high-IQ, villainous little madman as the bottom x a calculating, scheming top Two strong leads, in a story about spoiling each other while being unable to resist testing each other. Blurb for this story: After inexplicably being bound to a lunatic System, male lead Xiao Lin starts transmigrating through different worlds to win over and collect cards featuring different male gods. Boys' Love series Boys' Love series Male lead: Why do I have to seduce men to collect character cards? System: In a Boys' Love series, you have to get together with men! How will you complete the mission if you don't? And how will you get cards if you don't complete the mission? Likewise System: In a Girls' Love series, you have to change genders! How will you get together with women if you don't? And how will you collect cards if you don't? Tragedy series System: In a tragedy series, you have to keep getting hurt and dying! How will you make people cry if you don't get hurt or die? And how will you collect character cards if you don't make them cry? Sadistic series (The System's words are interrupted by Xiao Lin.) Male lead: All right, you're right about everything. Theme: