Unlike traditional visual novels that rely on static 2D sprites with limited blinking or mouth-flapping animations, utilizes a custom Flash-based engine to create a fully animated, film-like experience.
: The "devil" is actually students whose forbidden impulses have been awakened. This desire is infectious, passed between friends through intimate contact, leading to a school-wide cycle of corruption. Rondo Duo -Fortissimo at Dawn- PunyuPuri ff
: A school plagued by a rumor of an "after-school devil". Unlike traditional visual novels that rely on static