イロトリドリのメロディ (Irotoridori no melody) is a vocal track performed by Nagi Kobotoke (小仏凪), a member of Sega's fictional band Irodorimidori (イロドリミドリ), with vocals by voice actress Kaoru Sakura (佐倉薫). The song was composed, arranged, and written by bassy, a regular contributor to the Irodorimidori music catalog and Sega's broader rhythm game franchise roster. The accompanying music video was produced by Eto Noboru. Within the Irodorimidori narrative, this track is Nagi's third solo song, adding to a discography that fleshes out her character through music. The title translates roughly to "Colorful Melody," and the track's bright, energetic arrangement reflects the upbeat persona of its character. The song originally debuted in CHUNITHM STAR on December 21, 2017, and crossed over into maimai FiNALE on March 8, 2019, joining the ONGEKI & CHUNITHM genre category. The maimai version is a shortened edit (approximately 1:56) tailored for arcade play, while the full version runs 2:42 and appears on the third Irodorimidori album 卒業 (Sotsugyou), which also includes an instrumental version. In the maimai chart lineup, the MASTER chart (level 12+) was designed by 華火職人 (Kanon Oguni), and the EXPERT chart (level 10+) was designed by 小鳥遊さん (Takanashi-san), two established notes designers in the series.