東方Touhou [Synth Metal] Deaf to All but the Song

AND IT KICKS IN!
Man this tracks starts off with 200% energy! Somewhat unusual for Mystia's boss theme but definitely not unwelcome. It used to be one of my old favourite themes actually.
...does anyone happen to recognize the melody in the chorus? It doesn't sound like any touhou track I know so either it's a largely improvised version of Mystia's theme or a quote from another piece of music.
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Title: Overdose Rhapsodia
Artist: Substreet
Circle: Yumeiro Project
Album: Endless Fairy Tale
Original theme: Deaf to All but the Song (+ Stirring an Autumn Moon ~ Mooned Insect at 3:35)
Original game: Touhou 8 - Imperishable night

Mystia Lorelei, Touhou © ZUN