I'm thinking. This was your dare, you know. Don't pout so much just because I'm the one who turned it around on you this time! [He's pouting right back though, because Rin looks unhappy just as he's had an idea:

He could just kiss Rin-chan on the cheek. It's not like she said he had to kiss whoever-it-was on the lips, but the same time he was kind of curious. He wanted to find out why his heart was beating so fast back then--it was just nerves, right? But even afterwards, it didn't go away...

If he had any chance to find out, this was it. He couldn't get in trouble for it or anything.]