Mystic Parade is a narrative-driven original song from maimai DX BUDDiES, created as Episode 6 of the Kotonoha Project (言ノ葉プロジェクト) 2nd Season. The track was produced by the VOCALOID music duo ひとしずく×やま△ (Hitoshizuku-P and Yama△), who handled composition, arrangement, and lyrics. Vocals are performed by Yusuke and Naiko, both members of the Japanese entertainer group いれいす (Ireisu). The music video was directed by ツツミヒデアキ with illustrations by しきみ. The song's lyrics weave a gothic mystery: a girl named Matilda follows an angel who stole her mother's heirloom pocket watch to a grand mansion, a salon concealing a terrible secret. Interwoven with this is detective Nick's missing-persons investigation and a silver-haired university student who claims to be part of the Byrons' family. Theatrical refrains like "Welcome Mr. Stray Sheep" and "今宵はParade" cast the listener as a lost soul drawn into a fog-bound conspiracy. The waltz-like 133 BPM gives the track a music-box quality, reinforcing its storybook atmosphere. A VOCALOID version sung by Kagamine Rin and Len was also released on the producers' channel. In-game, Mystic Parade appears as an unlockable track in BLACK ROSE Area 9 (BLACK ROSEちほー9), with the MASTER chart, designed by はっぴー at level 13 (constant 13.5), and the EXPERT chart by アマリリス offering contrasting approaches to the song's dramatic structure.