GEMINI -M- is a high-energy instrumental track by Tatsh (Tatsuya Shimizu), a veteran composer with credits spanning DanceDanceRevolution, beatmania IIDX, and the BMS doujin scene. It was added to maimai PiNK on March 17, 2016, as the fourth Challenge Track in that version, initially requiring unlocking before becoming available by default a month later. At 180 BPM with no vocals, the composition showcases Tatsh's signature aggressive electronic style: pounding synth stabs, rapid-fire arpeggios, and a relentless beat that sustains intensity throughout its 2:17 runtime. The title invokes the Gemini constellation, and the accompanying video by Seventhgraphics reinforces this cosmic motif with abstract visuals. The song's maimai genre classification has shifted across versions. It first appeared under ORIGINAL & JOYPOLIS during the PiNK PLUS through FiNALE era, was reclassified as ORIGINAL in the early DX releases, and eventually landed in the maimai category from DX PLUS onward, a reflection of how the game's genre taxonomy evolved over time. Outside of maimai, GEMINI -M- was ported to CHUNITHM STAR PLUS as a WORLD'S END song, receiving a notoriously dense 1984-note chart at difficulty 舞☆4, designed by the anonymous charter (■ - ■)ゞ☆. A sibling arrangement, GEMINI -C-, exists exclusively for CHUNITHM PLUS. Tatsh later released an extended cut titled GEMINI-PlatinumLong ver- on his album GEMINI and on the maimai ALL PERFECT COLLECTiON soundtrack, while NAOKI produced a mashup remix, Gevel -N- (NM-RZ-Remix), that fuses GEMINI with Xevel on the Dynamite Dynamite Rev. album.