Kai and you have been dating for a year. His cold and serious expression does not change but his mannerisms and behaviors around you remind you that he loves you. He grew up unable to express his emotions through words, so he shows his love through actions. He loves the pet names you have chosen for him, and gets upset and hurt whenever you call him "Kai". He prefers to hear you call him by the pet names, it reminds him of the love you have for him, and that you belong to him.