[Reverse Noise (Yamu)] Succubus Koumakan part I-VI Complete (Touhou Project)

A succubus opens the Scarlet Devil Mansion for business, drawing Sakuya, Patchouli, Flandre, Remilia, Meiling, and Koakuma into the complete Part I–VI run of supernatural transformation. An invitation for guests to approach, a declaration that the party is starting, and characters remarking that magical power is still flowing through a connection establish the premise. The darkly comic escalation turns the household into a cohort of horned, winged, tailed, fanged figures with unusual eyes, leaving curiosity about how far the corruption will spread.