(⊙…⊙ )

I was surprised as well!

Yes, it's the same universe, Nathan is Nick's younger brother

wait i forgot who nick is

Nick (the blond one) is Kyle's (the black hair one) partner, and Kyle is Karlyle's younger brother, there is a prequel about them, Eggs Benedict (first novel in the universe), but it was never serialized, and probably won't be (novel is not so good, very frustrating moments, and after DTR people wouldn't be probably happy to see how Nick is going with Ash on test dates )

He’s married to Kyle, Karlyle’s little brother.

Oh wow now I need to reread dtr to remember who they are!

There are never too many reasons to reread DTR basically, Nick and Kyle are the ones who introduced Ash to Karlyle and suggested him to help Karlyle with his 'problem' at the beginning

Now I'm curious