Paradisoda is the theme song of maimai DX Splash PLUS, the March 2021 update to SEGA's arcade rhythm game series. Created by the rap-focused doujin music circle 魂音泉 (Tamaonsen), the track was composed and arranged by the production duo TINY PLANETS, comprising K's (also known as Coro) and AO, with vocals performed by rappers 雨天決行 (Utenkekkou), AO, and ytr, collectively credited as RBY. The music video was produced by illustrator and animator ツツミヒデアキ (Tsutsumi Hideaki). The song carries the in-game genre label SUPER SPA RAP, a self-referential tag printed on the jacket art and later formally recognized through circle point reward titles in maimai DX CiRCLE. True to its name, Paradisoda blends a bubbly, carbonated dance instrumental with rapid-fire Japanese rap verses, evoking a summer poolside festival atmosphere, a fitting match for the Splash PLUS update's Shuwashuwa (しゅわしゅわ, "fizzy") area theme. Lyrically, it invites listeners to wave goodbye to dull days and dive into the fun alongside the area's mascot characters らいむっくま (Lime Bear) and れもんっくま (Lemon Bear). The MASTER chart, designed by シチミヘルツ (Shichimi Hertz), features generally straightforward patterning but is known for twin consecutive slide notes in the chorus that can easily trip up players, while the EXPERT chart was handled by サファ太 (Safata). Paradisoda later crossed over into SEGA's sibling rhythm games ONGEKI bright MEMORY (August 2022) and CHUNITHM SUN PLUS (November 2023), solidifying its place as a standout track of the Splash PLUS era.