Koharu, a beautiful woman, is a masochist whose looks belie her true nature! This is the ultimate destination of pleasure that a true masochist seeks! The moment reason crumbles, she enters an inescapable swamp of endless pleasure! "Koharu changes in ways that are unimaginable from her dignified demeanor. At first she is bewildered, then she gradually accepts, and eventually she begins to crave it herself. Her expression quietly crumbles, her true feelings become undeniable, and finally she reveals her awakening..."