"物凄い勢いでけーねが物凄いうた" (Monosugoi Ikioi de Keine ga Monosugoi Uta) is a high-energy denpa-style arrangement of Kamishirasawa Keine's theme from Touhou Eiyashou ~ Imperishable Night. Composed by the doujin circle Halozy and sung by nanahira, the track launched the well-known "Monosugoi" (物凄い) series, a collection of frenetic Touhou character songs that would later expand to include characters like Flandre Scarlet and others. The song first appeared on Halozy's doujin album "Starry Presto" in December 2009, several years before it entered the maimai arcade series. The track was added to maimai PiNK on December 9, 2015, initially requiring a 4,000 MyBerry purchase before receiving a general unlock on June 30, 2016 alongside the PiNK PLUS update. Over subsequent maimai versions, its chart difficulties have been revised multiple times, the Master chart in particular climbed from Level 11 in PiNK to Level 13 by the PRiSM+ era, reflecting the evolving difficulty standards of the series. The Master chart was designed by mai-Star, while the Expert chart was handled by 某S氏, a designer whose alias translates to "a certain Mr./Ms. S." The jacket art, drawn by miya, is taken from the compilation album "Monosugoi Best" distributed at Reitaisai in May 2013. The same jacket illustration is shared across KONAMI's BeatStream version of the song and the SOUND VOLTEX entry "物凄い狂っとるフランちゃんが物凄いうた." The in-game movie, also by miya, was originally created for the 2nd Touhou Nico Dousai in 2010. At 180 BPM with nanahira's characteristically bright, rapid-fire vocal delivery, the song embodies the playful, over-the-top energy that defines both the Monosugoi series and the denpa genre it belongs to.