INFiNiTE ENERZY -Overdoze- is an instrumental electronic track by composer Reku Mochizuki, added to maimai DX as part of the BUDDiES PLUS update. The version featured in maimai is the 2023 Update remaster from Mochizuki's debut album Rextra, not the original 2019 release, a distinction that gives the in-game audio a refined, punchier production compared to the earliest version. The song boasts one of the most extensive cross-rhythm-game footprints in the independent music-game scene, appearing in over 20 titles. It originated from C4Cat's Dynamix Submission 2019 contest but was first implemented in Muse Dash (January 2020), later arriving in Dynamix as an event song (January 2022). Other notable appearances include Phigros, Lanota, Orzmic, ChainBeeT, TAKUMI³, DanceRail3, vivid/stasis, and Liminality. Its first arcade rhythm game appearance was Taito's MUSIC DIVER (January 2024), followed by maimai and later SEGA's CHUNITHM VERSE (March 2025). In maimai, the track sits in the GAME & VARIETY category at a steady 180 BPM. The Expert chart was designed by はっぴー (Happy), while the Master chart represents a collaboration between Jack and サファ太 (Safata), two prominent chart designers whose contrasting styles converge in a 14.0-level MASTER. The jacket artwork features Mochizuki's original character "れくもちちゃん" (tentative name), taken directly from the Rextra album cover. Fans commonly abbreviate the title as インエナ (Inena).