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99ep is the second major mini-album (third overall) released by Spitz. First press edition comes housed in a digipack. As the three songs were later, in 2004, included on their second special album Iroiro Goromo, the production of the mini-album was discontinued. The song "Sakana" was used in 2005 as theme song for the fifth episode of the second season of the dorama Koisuru Nichiyobi. The mini-album reached #8 on Oricon weekly charts, and charted for 7 weeks.