With ch.606, I can see why Carol would feel like sempai doesn't see her romantically.

Until recently I don't think most readers expected it either. I thought he liked Tomo. :S But it could have just been admiration and some attraction (cause who wouldn't think she's hot) while Carol is the one he always loved. (▰˘◡˘▰)

i didn't think of him liking tomo personally!
Just another character to make Jun react :) But since some chapter we clearly saw his affection towards Carol ^^