Constellation:

Character:

A student in S Class, he bears a strong resemblance to Haruka's idol, Hayato. He's said to be Hayato's identical twin brother and seems to bear a complex from being in his brother's shadow. He appears to be cold and aloof, as well as being a perfectionist. His character is reflected in his song, both his pitch and rhythm are perfect, but he gets criticised for having no "heart" in his music. However, everything is the fruit of his hard work. Tokiya is Otoya's (Class A) roommate. It is soon revealed that he is actually Hayato. Later in the story, he develops a genuine concern for Haruka.

Source from Wikipeida