long story short and just to be a little vague (up to you to deduce). The villain isn't really who we think it'd be... and ml had tried to protect mc from this truth all along, but it's too latem bcs mc is so *blind*. Everybody is killed in current timeline. Since learning the truth, mc will try to kill himself for multiple timelines next, every time he reincarnates, but this was all told in ml's pov (the pain). There are several things that will lead to resolution eventually, but damn it had to be more than a hundred reincarnations at that point. They eventually get a happy ending anw (thank god i was about to give up reading too), but for me the side stories saved it so much bcs doomed old yaoi isn't so doomed after all

i... did not expect the novel to go that way surely...