デーモンベット (Daemon Bet) is an original maimai song by producer ちいたな (Chiitana), featuring the VOCALOID flower. Added to maimai DX UNiVERSE PLUS on April 28, 2022, the track serves as Side Story Essence 6 of the 言ノ葉Project (Kotonoha Project) 2nd Season, a narrative-driven song series that weaves together character stories across multiple maimai original tracks. The song's title, a blend of "demon" and "bet," immediately telegraphs its gambling-and-vampire thematic core, reinforced by lyrics that depict a blood-soaked eternal wager between two damned souls. Musically, デーモンベット rides a steady 107 BPM with a brooding, gothic rock arrangement. Chiitana handled composition, arrangement, and lyrics, while guitar work was contributed by the unit kitto, zutto, bocchi. The official music video was produced by 群青リコリス, with illustrations by しきみ, Masako Wada, and Yurie Kudo. The track sits within the "Black Rose" narrative arc of maimai: its in-game flavor text recounts a tale from the Age of Exploration, where a mercenary named Byron crosses paths with Clemens during the latter's investigation of the "Black Rose Disease", a curse that transforms its victims into violent alter egos. What begins as mutual distrust deepens into reluctant friendship against a backdrop of unfolding tragedy. Chartwise, the MASTER difficulty (level 13, constant 13.2) was designed by はっぴー and carries a fittingly ominous 666 total notes, a subtle nod to the song's demonic aesthetic. The EXPERT chart (level 10) was designed by 翠楼屋. The track was released across all maimai DX regions simultaneously, with the Asian version following on September 16, 2022, and the Chinese version debuting on 舞萌DX 2023 on August 10, 2023.