When two people (presumably soulmates) are made for each other but were not able to get together due to unfortunate circumstance.
A: Wow, did you see how strong Dazai and Oda’s bond was in Bungou Stray Dogs?
B: Yeah, it sucks that they ended up acting out the right person, wrong time trope.
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi