Metamorphosism marked composer 削除 (Sakuzyo)'s return to the maimai series after a three-year gap following his previous contribution, PANDORA PARADOXXX (2019). It debuted in maimai DX UNiVERSE PLUS on August 5, 2022, as part of the 7sRef Area 2 unlockable content, initially requiring a cumulative distance of 850 km before becoming generally available from the FESTiVAL PLUS update onward. Musically, the track showcases Sakuzyo's characteristic compositional precision through metric modulation. While the BPM remains fixed at 144 throughout, extended sections built on 12th-note subdivisions create a perceptual shift that listeners feel as BPM 216 in 3/4 time, a deliberate rhythmic illusion that gives the song a distinctive temporal character. The result is a piece that feels faster and more driving than its base tempo suggests, a trait the MASTER chart exploits to full effect. The MASTER chart, designed by はっぴー (Happy), was originally rated level 14 at launch but was upgraded to 14+ (difficulty constant 14.7) starting from the BUDDiES version, an uncommon mid-lifecycle difficulty recalibration that reflects the chart's technical depth relative to its peers. The EXPERT chart was designed by 翠楼屋 (Suirouya). No Re:Master chart exists for this song. The accompanying music video was produced by 桜井貴志 (Takashi Sakurai) and ぴくせる (Pikuseru). The in-game flavor text offers a poetic meditation on noise, information, and perception, describing how seven-colored emotions packed into fragments provoke laughter, tears, and anger in every wanderer, and how finding meaning in noise triggers a world-altering transformation. This thematic framing of metamorphosis resonates with the song's title and its structurally shapeshifting rhythmic identity.