I feel stupid now for saying it involves a time loop because obv it does lol. I also said main character but I meant Doha.
Anyway, I was actually thinking of a larger time loop. Something beyond the usual reset to the start of the game whenever everyone dies.
I think every iteration of Doha stays in the game and reenacts every murder he's commited. As we have seen, Doha does not just exclusively kill the killers but his friends as well. Maybe he’ll end up killing Bada too at some point just to trigger a reset. Because Bada is too smart and if he lets him live indefinitely, he'll eventually figure out the truth behind everything and Doha doesn't want that.

I think this story will end up involving a time loop where all the killers and the main character are actually the same. But I'm sorry idk know how to explain this in a coherent way haha.