Living Universe is the English-language opening theme of Phantasy Star Portable 2 (ファンタシースターポータブル2), a 2009 PSP action RPG in SEGA's long-running Phantasy Star series. Composed, arranged, and written by Hideaki Kobayashi (小林秀聡), the track features vocals by Aimee Blackschleger and Tahirih Walker over an uplifting pop-rock arrangement driven by a steady 155 BPM. Its lyrics weave celestial imagery, wishes, stars, and light, that mirror the game's sci-fi setting and the "Universe" subtitle of the Phantasy Star Portable 2 saga. The song arrived in maimai as a downloadable track in the GreeN version on August 7, 2013, initially requiring 5040 maimile to unlock before becoming freely available from the Orange update onward. Fittingly for a song with "Universe" in its title, it was assigned as a bonus song in the Space Station area (宇宙すてーしょんちほー2), an in-game nod that deepened the thematic connection. Over the arcade's subsequent versions, Living Universe has seen multiple category reclassifications, from GAME to SEGA to ORIGINAL and finally settling under GAME & VARIETY, and its chart difficulties have been revised several times to keep pace with the evolving player skill curve. The Re:MASTER chart, designed by rioN and added in PiNK PLUS (November 2016), stands at Level 12+ with 495 notes, making it a dense, tap-heavy endurance test that demands consistent accuracy. The Master chart, by the anonymous charter 某S氏 ("a certain Mr. S"), offers a contrasting challenge at Level 11+, while the Expert chart from ニャイン (Nyain) provides a more approachable entry point into the song's rhythm. As one of the few surviving legacy tracks from the GreeN era that still receives active difficulty adjustments, Living Universe remains a staple of the STANDARD song list in current maimai DX builds.