Help me, ERINNNNNN!! (Band ver.) is a Touhou Project doujin arrangement by beatMARIO (COOL&CREATE) that stands as one of the most recognizable songs in the Touhou rhythm-game crossover canon. The track reworks ZUN's "竹取飛翔 ～ Lunatic Princess", the boss theme of Eirin Yagokoro from 東方永夜抄 ～ Imperishable Night, into a driving rock anthem built around the now-legendary call-and-response chant "(ﾟ∀ﾟ)o彡゜えーりん！えーりん！" (Eirin! Eirin!). The drawn-out, seven-N spelling of "ERINNNNNN!!" visually and audibly mimics the prolonged shout of her name that has become a hallmark of Touhou doujin live performances. Originally released on the 2007 album "Flowering ERINNNNNN!!," the song joined maimai under the GreeN version on September 5, 2013. It initially appeared as simply "Help me, ERINNNNNN!!" before being retitled to "Help me, ERINNNNNN!! (Band ver.)" in maimai でらっくす PRiSM PLUS, a change that distinguished the original band recording from the growing number of remixes and covers entering SEGA's rhythm game ecosystem. The song also appears in CHUNITHM and オンゲキ, making it a cross-SEGA Touhou staple. The maimai charts themselves carry narrative echoes of the song's performance culture. The EXPERT chart, designed by はっぴー, weaves slide patterns that mirror the arm-waving gesture crowds make during the "えーりん！えーりん！" chant, a rare instance of chart design directly transcribing a live-concert physical cue. The Master chart, designed by 譜面-100号, is a dense Lv12 course that packs 107 Slide notes into its 539-note total, demanding sharp coordination and slide-reading precision from even seasoned players.