Snow Colored Score is a crossover track featuring Irodorimidori, a fictional band originating from CHUNITHM, and was added to maimai DX FESTiVAL PLUS on June 8, 2023. The song was composed and arranged by Dai Saitou (齋藤 大) with lyrics by Konomi Fujimura (藤村鼓乃美), both of the production unit Hifumi, inc. All six members of the Irodorimidori cast provide vocals: Serina Akesaka (CV: Emi Nitta), Aliciana Ogata (CV: Ayaka Fukuhara), Nazuna Tennouzu (CV: Ayano Yamamoto), Nagi Kobotoke (CV: Kaoru Sakura), Naru Hakobe (CV: Mao Ichimichi), and Shirona Tsukisuzu (CV: Marika Kouno). The music video was created by Kafuu (カフウ). Snow Colored Score holds a milestone in the Sega rhythm game ecosystem: it is the first Irodorimidori song to launch simultaneously across all three arcade titles, maimai, CHUNITHM, and ONGEKI, and the first triple-game simultaneous release since Jörqer. It is also only the second Irodorimidori track, after 猫祭り (Neko Matsuri), to appear in all three games. In maimai, the song was unlocked through the limited-time Touhou Project x Irodorimidori area event by reaching a cumulative distance of 100 km. The maimai MASTER chart (Level 12+, constant 12.9) is distinguished by its heavy use of Slide and Touch notes, 102 and 70 respectively, creating a spatially demanding layout characteristic of its designer, アマリリス. The EXPERT chart was designed by Jack.