Chapter 16, did they do it between the scenes of them "going inside the house" and Suhyun ...

I doubt they'd skip it just like that (thered be at least a hint towards them sleeping together since it's shounen ai) and that the author would have them sleep together before Jaewoo confesses. This seems like a more innocent story where everything would flow in a specific order since it's Jaewoo's first relationship

ok, sounds good to me, I just found the transition of them kissing to just sleeping a bit weird

It definitely gave me whiplash too lol