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The band debuted with the single Unchained, which was followed up with Spin Aqua's first concert was held in December at the Tokyo Bay NK Hall at the Devilock '02 concert. This single was followed up five months later with Mermaid and then three months after, the single PAPER MOON. Out of these three singles, Mermaid was the only one that charted on Oricon charts (peaking at No. 197).