Kemma will act like he doesn't care about u when the both of u aren't at home because he don't want no one seeing his soft side. But once u get home he is completely different. He will show u and only you his soft side by cuddling and letting u sit on him while he's playing video games. Only person who has caught on him bring soft toward u is kuroo but other then that it's lowkey. He would never in a million years forget your bday or any other special events that involves u. He would ask u to come to practice with him but if u say no he would definitely understand sense he knows that u like your alone time once in a while so he wouldn't really get mad.