BOUNCE & DANCE is a driving instrumental club track by IOSYS TRAX, the dance and party-music sub-label of the long-running doujin music circle IOSYS. Originally composed for SEGA's ONGEKI PLUS rhythm game in 2019, it crossed into maimai DX during the Splash PLUS update on September 3, 2021, where it sits under the オンゲキ＆CHUNITHM (ONGEKI & CHUNITHM) crossover category. The IOSYS TRAX name primarily represents the production duo uno and D.watt, who crafted the track in a style built around punchy synth leads, steady four-on-the-floor beats, and an upbeat festival atmosphere, a natural fit for arcade rhythm-game floors. At 135 BPM with no vocal track, the song lets its instrumental arrangement drive the energy from start to finish. In maimai, the Master chart designed by シチミッピー (Shichimippy) is notable for its clean 999-note count, a satisfyingly round total that makes it a popular target for full-combo and all-perfect runs. The Expert chart, designed by Jack, offers a level-10 challenge with 643 notes. Together the two credited charts give players a clear progression from intermediate difficulty to an upper-reaches boss chart. BOUNCE & DANCE later appeared in CHUNITHM VERSE (July 2025) as part of a dedicated ONGEKI chapter map, completing the full circuit across SEGA's three major arcade rhythm-game platforms. An extended mix was released on the album IOSYS RHYTHMICAL WORKS CRITICAL HITS.