Riku noticed as soon as their lips connected that Sora was doing it differently this time. There was a closer press and Riku opened his mouth slightly under Sora's, tasting grape popsicle, slightly cherry flavored.
It would have been fine, but somehow, possibly it was the turn of their heads or a gasp of breath of WHAT, but Sora's lower lip, somehow it ended up between Riku's, all soft and warm and sweet.
It was... positively lovely. So much so, that it scared him.
Riku pushed back from Sora and jerked away so hard that he tumbled off his chair. "I'm sorry!" Riku said quickly, his face bright red. His heart was beating so hard he swore Sora would be able to hear it. "I'm sorry, I don't know why, I'm sorry." He was shaking too.