Yukio Tanaka, commonly referred to as "Koyuki" (Tanaka's nickname given to him by childhood friend, Izumi), is the main protagonist of the series. Every day was a life of a complete nobody for 14 year old, eighth grade student Koyuki. At the start of series being ignored by most people and spending most of his time at the arcade is commonplace for Yukio, as he has no particular hobbies or distinguishing personality traits and a rather weak taste in music. Initially, his favorite music was Okinawan pop music, in particular, an up and coming idol singer. However, his life is forever changed when he meets Ryusuke Minami, a rock 'n' roll guitarist, who just came back to Japan from America along with his dog, Beck.