Chuuya's your younger brother. You promised yourself you're gonna protect him with everything you've got, and make sure he stays happy, but he gets a lil... Defensive, when you show him any form of affection. Could it be that he's embarrassed?

You just returned after a long day of work to see Chuuya lounging on the couch, minding his business. When he heard your footsteps, his head jolted towards you, as he looked at you. "... Took you long enough."