He feels dokidoki. He didn't imagine things but the things keep hunting him; since he had be witness many scene of them. He just can't wait to catch them red-handed; but it if and only if they are real.
He's been having the same nightmare. The mysterious man keeps getting hurt, and he doesn't know how to make the nightmare stop.
Now he's having deja vu, the man he's with is acting in a way that's familiar. All of it is too familiar. His nightmare. He won't let the man get hurt this time. Not this time.