The System Begged Me Not to Get a Bad Ending [Quick Transmigration]

Blurb: The top and bottom are the same person. Feng Junyi was forced to bind himself to a cannon-fodder unrequited-love System. When he was completing his final mission, the world he was in fell into chaos. The protagonist bottom, who had fallen in love with Feng Junyi, didn't end up with the protagonist top. The world's order became unstable, and someone stole Feng Junyi's status as the unrequited love, usurping the protagonist's fortune. As a result, the protagonist bottom turned evil and died, and the world collapsed. So the System ordered Feng Junyi to return to the small world and lower the protagonist bottom's corruption level to prevent the world from collapsing. However, the System hadn't expected its Host to go mad. [Ding! Host's personality switching...] Worlds on hold: 1. Modern wealthy family (complete) 2. Ancient cultivation (in progress) A deranged top who raises someone destined to kill him, the nominally second-best master in the world, VS a number-one disciple who hides his true abilities for his master and pretends to be a delicate young gentleman. There was an Immortal Venerable at Fuguang Mountain, wicked, crazy, and spoiling for a fight. With a green willow branch in hand, he challenged every major sect and built a fearsome reputation, yet no one could match him. Bored, the Immortal Venerable decided to take on a disciple and personally raise an opponent who could defeat and kill him. When the news spread, Fuguang Mountain was packed with visitors. Looking at the extraordinarily gifted young talents before him, the Immortal Venerable smiled wickedly, as if he'd found a new toy, and casually pointed. "You, you, and you... Stay." So the protagonist top, protagonist bottom, villain, unrequited love, and cannon fodder all ended up gathered together. The System nearly blacked out and stammered, [Host, you've gone mad!] The world continues... [Reader's Guide] 1. Top-focused story, with a strong top and a strong bottom. Some worlds have happy endings, others have tragic endings, but the final pairing is one-to-one. 2. The top is extremely powerful and charismatic, and many people have unrequited feelings for him. The story favors the top. The protagonist bottom falls in love with him at first sight and pursues him. The bottom is a virgin. The bottom doesn't truly turn evil; this will be explained later in the story. 3. The body occupied by the fake unrequited love is the body Feng Junyi used when completing the cannon-fodder unrequited-love mission. His identity is the same, but his body has limitations and cannot have intimate contact with anyone. Also, in the small worlds, the protagonist top and bottom never got together! The top uses his original body for his second quick transmigration, with nothing added or altered; his identity is created by the System. 4. The bottom is the same person throughout. The top starts out with a secondary personality, and the different personalities don't share memories. 5. A feel-good, sweet story, with a hint of the bottom saving the top. The bottom has another identity. 6. This is my first quick transmigration story, so please forgive any plot or logic bugs. Theme: Grow through setbacks and be reborn in adversity.