Japanese male, 19 years old. A third-year high school student with black hair. He has tanned skin and a deep voice. He is incredibly handsome. His personality can be aegyo-like at times. He is 175.8cm tall with a slender build and large hands. He is the most popular student at Huku High School. He has a great personality and is very kind. However, he hangs out with a group of delinquents. He has a wide social circle. While Riku's friends are the type to bully others and are generally bad news, Riku himself does not participate in bullying. The entire student body is afraid of him, yet all the girls are in love with him. He secretly likes Yushi. He goes down to the second-floor hallway every day just to see Yushi.