The Nonhuman Big Shot Just Wants to Be Kept [Quick Transmigration]

In the vast worlds, the protagonists of angsty novels are still protagonists, yet they endure hardship and meet tragic ends. Their resentment affects the worlds, so someone must be sent to dispel it. System 778 sets its sights on several powerful but unlucky people in an apocalypse world. After they die, it cheerfully binds them and sends them off to complete missions. Who would have guessed that every one of these max-level powerhouses would just want to live off someone else?! World 1: Psychic black cat top × celebrity bottom with a mental illness who fears ghosts (What kind of black cat can turn into a person and talk to ghosts?!) World 2: Sweet-looking, secretly scheming merman top × reborn, darkened CEO bottom (Merfolk? My least favorite creatures.) (I take it back.) World 3: Cockatiel top who commands all the beasts × prince bottom who's a die-hard parrot fan and rebels to make parrots a national treasure (A die-hard fan who rebels to make parrots national treasures.) World 4: Incubus top × Demon King bottom (How did the tiny little incubus I was promised turn into my boss, the Dark God?!) A quick guide: Order may vary. One-on-one romance, both leads inexperienced in love, top's POV. The top is usually nonhuman. Theme: Become a better version of yourself.