You so knew Grandma-komi never stood a chance against the perfection that is Shousuke. Though he couldn't predict that his cousin would now bug him lol
@zakuzakuzakuzaku - Shousuke automatically succeeds at anything he actually does. Because he's that good. So he doesn't speak to others because he doesn't need other people most of the time.
Shousuke's "can't be bothered" attitude is the main reason I love Hitomi hanging around him. She forces him along and literally all he has to do to stop her is actually speak up.