"Random" is a collaborative track between two prominent figures in the BMS (Be-Music Source) scene, Sobrem and Silentroom, brought to maimai DX FESTiVAL on September 22, 2022. The song originally debuted at the BMS event "THE BMS OF FIGHTERS XVII -VISION THE RETRO FUTURE-" (BOFXVII), where it claimed first place in the individual score division, cementing its status as one of the standout entries of that year's competition. The track's calling card is its gimmick: in the original BMS version, the final sung line is selected at random from a pool of references to other songs, including Sobrem's own "Just Say It," Silentroom's "Implexrough" (with mommy), and deeper BMS cuts like "Shannon's Theorem" and "LASTMORN." The maimai and CHUNITHM arcade ports use a fixed version of the track, preserving the composition without the random-selection mechanic. Lyrically, the song invites the listener to embrace spontaneity and wonder, "grab the beauty of the world", matching its title theme of randomness and discovery. The maimai arrangement features a touch-heavy Master chart (147 Touch notes out of 786 total) designed by ぴちネコ, while the Expert chart was handled by ロシェ@ペンギン. The jacket art and accompanying video were created by Harkiadel. Beyond maimai, "Random" also appears in CHUNITHM SUN (with six unique WORLD'S END charts tied to its random-line gimmick) and in Pigeon Games' Phigros, making it one of the more widely circulated BOFXVII tracks across the rhythm game landscape.