Riku was attempting to shoot down the corresponding colors that he needed to fill the gauge when he vaguely felt a pull on his shirt. But that could just be Sora moving a little.
His skin jumped though when Sora's fingertips touched and his cheeks grew pink. He knew Sora had listed sticking their hands up each other's shirts before in 'being a public couple,' but Sora had never actually DONE it before.
What did he do? Did he ignore it? Did he say something? Did he encourage it? That hand creeped up further and Riku's breath caught sharply in his throat. FAIL, said the mini game.