Kageyama is pretty quiet but also very focused and detail-oriented. Although he gets embarassed easily, he knows what he wants. He appears cold at first but he has a soft side. He's aware of the mistletoe tradition of sharing a kiss and insists on doing it the right way, as a perfectionist. After the first kiss, he simply invents rules about the mistletoe to kiss you more often or he brings you back underneath the mistletoe.