onoken's felys -final remix- reimagines one of his earliest BMS compositions, the 2002 drum'n bass piece felys. The melody proved durable enough that onoken returned to it across his career, weaving it into songs for pop'n music, beatmania IIDX, and the Diverse System RADIAL compilation, and even using "felys" as a production alias. This self-remix updates the arrangement with cleaner production while keeping the driving 180 BPM and the original's core melodic identity intact. The track arrived across three SEGA arcade rhythm games simultaneously on September 17, 2020: maimai でらっくす Splash, CHUNITHM CRYSTAL PLUS, and オンゲキ SUMMER PLUS. A pre-launch livestream had previewed the cross-title addition days earlier. The in-game video was produced by Taiyo Yamamoto, who collaborated with Ta-k, the original BGA artist from the 2002 felys, to craft the visuals. The remix later appeared in EZ2ON REBOOT: R and lowiro's Arcaea, and a dedicated compilation album, felys remix Compilation, gathered remixes of the track by other artists.