パーフェクト生命 (Perfect Life) is a Vocaloid track by NayutalieN (ナユタン星人) featuring Hatsune Miku, originally uploaded to NicoNico Douga on October 6, 2015 as the producer's fourth published work. The song later appeared on his debut album ナユタン星からの物体X (Object X from Planet Nayuta), released the same year. Driven by a relentless 200 BPM tempo and layered with bright synthesizer melodies, the track exemplifies NayutalieN's signature high-energy electronic pop sound. Its lyrics play with the irony of the title, the narrator describes themselves as a "フラストレーション生命体" (frustration life form) and "デストラクション生命体" (destruction life form), a self-deprecating contrast to the "perfect life" the name promises. パーフェクト生命 joined the maimai song list on July 14, 2016 as part of the PiNK PLUS edition, and later crossed over into SEGA's CHUNITHM STAR on September 7, 2017. In maimai, the Master chart, designed by はっぴー (Happy) at a difficulty constant of 13.4, is notable for its unusual note composition: 730 tap notes and 151 slide notes create a flow-driven pattern, while only 11 hold notes appear across the entire chart. The Expert chart was designed by rioN. The song's difficulty has been adjusted upward multiple times across maimai versions, reflecting both its enduring presence in the standard track lineup and the community's recognition of its demanding play pattern.