Kazuya Usaka together with Ryohei Toba, Heita Toujoin, and Kei Uehara are Karin Kurosaki's friends, often seen playing soccer with her.
Appearance[]
Kazuya has a normal hairstyle and wears glasses.
Personality[]
Despite the glasses he wears, he is shown to be quite stupid. Also, like the other boys of the group, he is quite shallow, and views Karin, who was the strongest and smartest of the group, as their leader.