To Mahiro, her brother-in-law Masahiko was like a Madonna—untouchable and revered. While her husband was away on a business trip, Masahiko repeatedly invaded Mahiro's privacy, secretly watching her masturbate in the bathroom. He went further by covertly filming her cheating with her husband's coworker, then used the footage to blackmail her into becoming his "sex slave●." He forced her to wear a collar in front of his friends, made her lick a dildo vibrator, and subjected her to forced masturbation. His aroused friends swarmed around Mahiro, escalating into violent sexual acts. And at the height of it all, Masahiko...