Kamai joined in with Kai's melody, his mind indicating him that he is tired. He didn't stop though, and wouldn't until Kai was done. Either that or he'd let the piano fade out softly. His green eyes got softer and lost a bit of their energy and he stared blankly in front and played calmly. He wasn't sure what to do and he just played on, now staring at Kai blankly. Kamai needed to get to sleep, and soon before his powers lose control and he falls asleep on the floor in kitsune form.
He began to make the piano fade out so only Kai was playing and when he was done, he fell backwards from his seat, turning into a kitsune for the time being. He climber up Kai's back and onto his shoulders again, his eyes sleepy.