Yaoi's that cure my existential crisis

It's a unique isekai where the mc makes a game with a suffering protagonist but that backfires when protag (love intest) starts killing him irl making the days repeat until he gets a chance to change things when he's transported into the game he made. Ensue a danganronpa/yttd premis were McKellen has to survive various games while trying to save and get close to protag to save his butt but in the process they gradually fall in love. Its a lot more complicated and has a good amount of twists 7/10