They were high school students and one omega was bullied by a gang of alphas. The leader of the group caught a whiff of his scent when they were about to assault him and I think he stopped them. the omega guy ended up with another alpha he fell for and they bonded through biting. Later on, the bully ended up with an omega of his own when they were all grown but they soon realize they were with each other's fated mates. the bullied omega's fated mate was the bully and the bully's omega was the fated mate of the bullied omega's alpha
Why do I have a memory of Yamato and Seki talking and Yamato asking him, "Seki, are you gay?", With seki becoming extremely flustered and speechless as though he'd been found out? They were speaking in private because Seki overheard something and wanted to confront Yamato but was found out instead.
This isn't even in any chapter. Did I dream this? It's crazy.