Kitagawa Yuzu, with her beautiful body, loves dry sex; the more she's fucked, the louder her moans become—she's undeniably adorable. Why would such a pure and gifted student face such a tragedy?! Rape, gang rape, an endless hell of discipline... Her pitiful screams are violently suppressed by the men, until she gradually becomes powerless, driven to a mental breakdown by their penises, degenerating into a perverted pet who enjoys being kept by their penises and subjected to anal penetration...