It's complicated, right?! Junba scene showed how much they truly care about each other! :)
You'll find out how things will evolve between Matsumiya in the next one. It's tough but Jun truly loves Nino, like the latter loves Jun. They just need to have a serious talk or something happens and "force" them to have this talk. I think Nino has already reached bottom - he faces a lawsuit and Jun has already left him - but hopefully, with Jun's help he'll manage to get up and have a new start!
And yes! I agree with you about this new path of careers for both Junba!
Don't worry! I love long comments!! ^^

Thanks a lot for reading and commenting dear! <3