Xevel (ゼヴェル) is a high-energy original composition by Tatsh (Tatsuya Shimizu), a veteran of the BMS scene and a prolific contributor to SEGA and Konami rhythm-game series. It was added to maimai MiLK PLUS on September 4, 2018, as part of the fourth cross-title Tenkaichi Otogesai (天下一音ゲ祭) event. The track features vocals and chorus by TomomiNatori, with jacket illustration by MAYA, and falls under the ONGEKI & CHUNITHM in-game genre category. Xevel belongs to Tatsh's "X" series, a loose collection of songs with titles beginning with "X" that span multiple arcade rhythm games, including Xepher (beatmania IIDX), Xa (太鼓の達人), Xand-Roid (GROOVE COASTER), Xanatos (Arcaea), and Xenolith (Paradigm: Reboot). The song opens with roughly eight measures at 176 BPM before settling into 185 BPM for the remainder, a detail that arose because maimai's chart format at the time did not support variable-BPM (soflan) notation, so only the initial tempo was displayed. Its dark, driving orchestral-hardcore sound, punctuated by lyrics about war, loss, and the fight to preserve love, fits squarely in Tatsh's dramatic compositional style. In maimai, the MASTER chart (level 14, constant 14.3, designed by すきやき奉行) is a dense endurance run packing 1,169 notes, including a prolonged break-slide section that coincides with the song's opening 176-BPM segment. The EXPERT chart (level 12+, constant 12.9, designed by サファ太) also presents a substantial challenge with 721 notes. Xevel later appeared in SOUND VOLTEX, GROOVE COASTER, and 太鼓の達人 through subsequent Tenkaichi Otogesai rounds, and was also added to オンゲキ R.E.D. PLUS in 2021, cementing its status as a cross-franchise staple.