でらっくmaimai♪てんてこまい! is a maimai original song that serves as the theme for でらっくま (Delu-kuma), the cheerful bear mascot introduced alongside the maimai でらっくす (maimai DX) era. Composed, arranged, and written by yashikin (Kouta Kobayashi), a frequent maimai and SEGA rhythm-game contributor, the track features Delu-kuma herself on vocals, performed by veteran voice actress and singer Suzuko Mimori. At 178 BPM, the song is an energetic, playful pop number whose title is a pun weaving together "deluxe," "maimai," and the Japanese onomatopoeia てんてこまい (tentekomai), meaning to rush or bustle about in a flurry of activity, a fitting description for the nonstop note-chasing of a rhythm game. The music video was created by 植草航 (Pie in the sky). Released on July 11, 2019 as part of the debut lineup of maimai でらっくす, the song was originally unlockable by accumulating 10 meters of total distance in the Beginning Area (はじまりのちほー). From maimai でらっくす Splash onward it became available by default across all regions. The track also crossed over to SEGA's companion rhythm game オンゲキ (ONGEKI) as a collaboration song starting in ONGEKI SUMMER PLUS. Its EXPERT and MASTER charts were designed respectively by Jack and はっぴー, two veteran charters whose styles lend each difficulty a distinct character, the MASTER chart at level 12+ (constant 12.7) features a dense 772-note layout heavy on slides and touch notes, reflecting the song's high-energy, bouncy rhythm.