It seems like the author is connecting the story to Reimei no Arcana, a manga that was released and finished back in around 2010, really recommended and a huge thing for us fans from a long Time
Yaoi, manhwa, main character thought his lover was cheating on him and died on the elevator before they could finish arguing. Reincarnates at the moment they started dating. It's not that good since i dropped it but now i wanna know the end. Thank you!
Like, dude has to live with the guilt. While it doesn't make it better for the ones affected, at least it shows he wasn't happy ever after.