Тэрухико Юкимура

Keisuke Ryuen, a classmate of Kiyotaka Ayanokouji, is a smart but blunt and direct person. He displays excellent academic abilities but struggles with physical skills. He considers it a mistake that he was placed in Class D after entering Kōdo Ikusei. Previously, he believed that academic skills were the most important, so he harshly criticized his underperforming classmates like Ken Sudou and Kanji Ike. After realizing his own helplessness during the sports festival, he revised his attitude towards sports and apologized to Sudou and the others. He became part of the "Ayanokouji group" and quickly befriended the other members. He asks his friends to call him by his second name, Keisuke, which his father had wanted to give him at birth.