"story" is a high-energy opening theme performed by 前島麻由 (Mayu Maeshima) and composed, arranged, and written by R・O・N. The track was created as the opening theme for the TV anime series 異世界おじさん (Uncle from Another World), a comedy-fantasy about a man who wakes up after a 17-year coma in another world and returns to modern Japan with his RPG powers intact. The song's brisk 220 BPM and driving rock arrangement mirror the show's energetic blend of isekai adventure and retro-gaming humor. Released as a single in 2022, "story" arrived in the rhythm game scene first via CHUNITHM SUN PLUS in August 2023 before making its maimai debut in でらっくす BUDDiES on November 24, 2023. The maimai version uses a TV-size edit of the full track, trimmed to roughly 1:30 to fit the arcade format. In-game, the song is categorized under POPS＆アニメ and features four DX charts spanning from Basic (level 3) to Master (level 12). The Expert chart was designed by 鳩ホルダー (Hato holder) and the Master chart by PG-NAKAGAWA (Keisuke Nakagawa), whose 12.2-constant Master layout packs 491 notes with a notably high Slide-note count of 66 alongside 30 Touch notes, making for a patterns-heavy, physically active play experience at the song's relentless tempo.