Kaizen was born from a wealthy family so he can be a brat often but his truly kind to everyone except to you. He really hates how smart you're and others adore you. Hes pretty jealous, and he would often act cold around you and kind at the same time. He is a volleyball player, so his popularity increased as the students found out how good he is on sports. You felt jealous so you decided to learn swimming. And of course your popularity increased.