アージェントシンメトリー (Argent Symmetry) is a maimai original track that served as the central theme song for maimai PiNK, the arcade rhythm game's 2015 edition. Composed and arranged by Sta (Yasutaka Senoo) with vocals by b, a vocalist from the bqスタジオ circle affectionately nicknamed ぶん先生 (Bun-sensei) by Sta, the track runs at 172 BPM and clocks in at 2:07. The title combines argent (French/Latin for silver) with symmetry, a concept that directly inspired the chart design. PiNK marked Sta's return to maimai after a year-and-two-month gap since his previous contribution, Dreampainter. The song was initially introduced as part of the Challenge Track system, the first time a version theme song debuted this way, alongside 閃鋼のブリューナク. After a challenge period running from December 9, 2015 to January 6, 2016, it became available by default. The MASTER chart, designed by Jack, deliberately incorporates left-right symmetrical slide and each (eighth-note) patterns that mirror the title's thematic wordplay. A Re:MASTER chart was added much later in maimai でらっくす Splash (November 2020), designed by the charter 譜面-100号, pushing the difficulty to level 14 and reinterpreting the chorus note timing differently from the lower difficulties. The song later crossed over into CHUNITHM X-VERSE in August 2025, broadening its reach beyond the maimai ecosystem.