성별 : 정보신청
생일 : 정보신청
키/몸무게 : 정보신청

Kai is Ichika's other tutor. He teaches her math and science. He is introduced as the twin brother of Sei. Of the two, Kai seems the more extroverted one and more physical in nature.



            * Date of birth: 1984-06-15

            * Height: 185cm

            * Blood type: A



(from wikipedia)