Ryuutaro was stuck somewhere between laughing and crying as he saw Hayato slowly regain consciousness again.
It was kind of hard to bite back the tears of relieve, but he did so. Instead he just gave his boyfriend a warm smile.

"I'm here. Really." - even though he didn't quite now how to feel about it.
Ryuutaro leans forward, placing a short kiss on Hayato's forehead. Usually this happened the other way around, but there was no better time than now to switch roles for a while.
"Welcome back."
Welcome back to what... consciousness or his own world in general was up to interpretation.