The Overpowered Hero Insists on Marrying Me

* There is a kind of supporting male character whose main job is to suffer alongside the domineering male protagonist. The day the protagonist achieves fame and success is the day they exit the story and get killed off. One day, an emergency came up in the Supporting Character Division of the Grand World Administration Bureau. A supporting character in a xianxia world had awakened and gone AWOL, so someone had to be sent in immediately to fill the role. The supporting character had a major role and deep feelings. He was the side character who had been at the protagonist's side the longest, and even his exit was earth-shattering. It wasn't a normal faked death. He betrayed the protagonist and joined the main villain, then the protagonist, pushed to the brink, tortured him until he died and came back to life over and over before finally granting him a quick death by grinding his bones to dust. The manager couldn't find a replacement right away, so they decided to send in a System as an emergency measure. The System could block its senses, wipe its memory as soon as the mission ended, and immediately start the next one with a full charge. Could it do the job? * As the first System to take part in a mission firsthand, I carried everyone's hopes and entered the small world with an unstoppable spirit. I diligently completed my tasks and conscientiously followed the plot. In childhood, I stayed with the protagonist as his family was slaughtered. In adolescence, I stayed with him as he was bullied. During our escape, I went over a cliff with him. Just when the good days seemed to be coming, I turned around and betrayed him, joining the main villain instead. So satisfying! * A new mission came just a few days later. This time, both protagonists awakened and ran off right before the story began, so the replacement had to play both roles. As someone with experience filling in, I was once again entrusted with great expectations. The first time is unfamiliar, the second is easy. Playing two roles at once shouldn't be a problem. ...Or so I thought! That lousy manager didn't say these two missions took place in the same small world! Aaaaaaaaa! P.S. First-person narration, a funny little story. System uke x domineering male lead seme. Theme: Keep hope in your heart even when trapped in dire straits