KITTEN
Hayato had ever though that Ryu looked like a little cat. But in that moment, when he saw him curling up over himself, he was sure that the other had been a kitten in an other life. He was still looking at him when the sleeping boy woke up.
"...hayou"
"Ohayou"
And the moment left, but Hayato always remember it when he is with him and he can't help to laugh about nothing remembering that day, and then Ryu watches at him oddly, but Hayato doesn't mean it, he just keep laughing until there isn't more air in his lungs, and then, usually, Ryo punches him in the arm playfully (or not so).
But sometimes, when Ryu is in a good mood, he would laugh as well, because Hayato laughing is a funny thing (especially when he is eating ice cream, 'cause he mess his face with it while laughing, like these time when he was eating chocolate ice cream and laughed about something the guys had said and it earned him a dirty face and an award from Ryu, because Ryu REALLY like the chocolate ice cream, especially when it's covering Hayato, but it has nothing to do with this history).
And Hayato knows that when Ryu laugh it's a good signal...