げきオコスティックファイナリアリティぷんぷんマスタースパーク is a bombastic, comedic Touhou Project arrange by ARM of the legendary doujin music circle IOSYS. The song first appeared in maimai でらっくす (the inaugural release of the maimai DX series) on November 1, 2019, as part of the Touhou Project area unlock event. It marries two classic ZUN compositions, Marisa Kirisame's signature theme 恋色マスタースパーク (Love-Colored Master Spark) from 東方永夜抄 ～ Imperishable Night, and メイガスナイト (Magus Night), the extra-stage boss theme from 妖精大戦争 ～ 東方三月精, into a single frantic 1:56 track at 200 BPM. Originally released on the 2013 IOSYS album げきおこ☆メイガス, the track is a vocal duet in which beatMARIO voices an increasingly enraged Marisa Kirisame and ARM himself voices a bemused Reimu Hakurei. The lyrics channel the full spectrum of Japanese internet anger slang into a parody of Marisa's Master Spark spell, complete with shouted interjections, dramatic buildup, and a chorus built on variations of "ぷんぷん", the onomatopoeia for puffing with fury. The title itself is a deliberate mouthful that strings together 激おこ (gekioko, "super mad"), ファイナリアリティ (finality), ぷんぷん, and マスタースパーク into a single absurdly long name that has become something of a meme among Touhou arrange fans. In maimai, the song features chart work by two of the game's regular designers. The Expert chart (Lv10) was created by はっぴー (Happy), while the Master chart (Lv12+, constant 12.8) was designed by 某S氏 (Bou S shi / "Mr. S"). Both charts translate the song's relentless energy into dense, high-speed patterns that demand precision at the song's relentless BPM.