GIGS is one of several temporary groups of Prince of Tennis characters that were placed together to sing on character CDs and on opening and closing credits for the anime series. This particular group's line up consists of Echizen Ryoma (seiyuu: Minagawa Junko), Atobe Keigo (seiyuu: Suwabe Junichi), Tezuka Kunimitsu (seiyuu: Okiaku Ryotaro), and Sanada Genichirou (seiyuu: Kusunoki Taiten). They sang the first opening song, Flower -咲乱華-, for the Prince of Tennis OVA, .