Nino and Masaki. If only they being honest with each other they are probably boyfriends by now ^^ I see that Nino has realized his feelings for Masaki, and now it just a matter of time they confess their feelings.
I feel for poor Jun. It's painful to be in unrequited love with Sho and it's more painful that Sho is now much more interested in his own sister. But at least Satoshi, unknowingly will be there for him. It's good that Jun is inviting him together to the party. I wonder what might happen there to kick start Jun-Satoshi moment?