In this game a lewd busty witch named Patchouli gets imprisoned in a
monster-infested dungeon and attempts to escape.
This game is derived from Touhou Project, but since it's only loosely based on it,
even if you don't know the original work, it's still possible to enjoy it just for the interspecies sex.
Receiving specific lewd attacks a certain amount of times
triggers events that awaken sexual disposition skills.
Lewd attacks also raise Patchouli's climax number and increase sensitivity magnification.
Her climax frequency rises whenever her sensitivity magnification rises, and whenever she climaxes
her sensitivity magnification rises... this results in an infinite climax loop,
and since the parameters increase endlessly, it's recommended that you enjoy it as much as you wish.