シカ色デイズ (Shika-iro Days) arrived in maimai riding the wave of one of 2024's most infectious anime earworms. As the opening theme of Wit Studio's surreal comedy しかのこのこのここしたんたん (My Deer Friend Nokotan), the track, performed by the show's voice cast collectively credited as シカ部 (Shika-bu), became a cultural shorthand for the series itself. Its chorus, built around the rapid-fire refrain "shikanokonokonokokoshitantan," spread across social media as a dance trend long before the song reached any rhythm game. Composed by Yuuki Waga (和賀裕希) with lyrics by Kana Yaginuma (柳沼香菜), the piece channels the manic energy of its source material at a brisk 183 BPM. The maimai interpretation, introduced alongside the PRiSM PLUS update in March 2025, leans into the meme potential of the track. The MASTER chart, designed by はっぴー, includes slide notes intentionally shaped like the hiragana characters し, か, の, こ, and ぬ, tracing the song's most recognizable vocal fragments across the screen at level 12+ (constant 12.8). Meanwhile, the EXPERT chart by 鳩ホルダー (Hato Holder) offers a dense but more conventional challenge at level 9+ (constant 9.6). Outside Japan, players encounter a different jacket illustration for the song, with the background video replaced by a static version of that alternate art. The track was made available simultaneously across Japanese, International (Asia), and United States regions at the PRiSM PLUS launch, giving the meme-fueled anthem an unusually broad day-one release for an anime tie-in.