Sending the Scum Bottom to His Doom (Quick Transmigration)

This is the story of a miserable top who keeps sending off a scum bottom doomed to live only ten years. Detailed Summary: A top who constantly transmigrates and desperately wants to die but can't encounters a system that promises to help him successfully die—as long as he completes its tasks. System: Your task is to pursue the mission target, never abandon them for ten years, and then happily wait for them to die before finding a spot to bury them. Su Ying: That’s it? System: That’s it. Simple, right? Su Ying: Simple? Simple my ass! You didn’t tell me the target was this kind of scum! How does someone so scummy deserve my angelic love? System: A little scum is fine—they’ll die in ten years anyway. Su Ying: Fair enough. (Ten years later) Su Ying: I’ve fallen for them. System: Oh. Still gotta find a spot to bury them, though. --- P.S. 1. Top protagonist, scum bottom, neither is a virgin. 2. Definitions of "scum bottom" vary. Here, it refers to a flawed character who may seem scummy by societal standards, not an absolute villain. 3. A tragic, realistic, serious-toned novel. No wish fulfillment, constant frustration; the protagonist is ordinary, imperfect, and has no cheat abilities. Angst from start to finish—though, in my opinion, it still counts as HE.