On a sweltering summer day, Toko's brother-in-law, having failed at work, returns to his family home, his emotions in turmoil. With just one word from Toko, his pent-up desire erupts uncontrollably. He violently assaults her, desperately craving her body. Drawn into the situation, Toko is restrained and spanked, revealing her hidden masochistic nature as she awakens to pain and pleasure. Overwhelmed by her brother-in-law's twisted lust, she gradually accepts herself as his "sex slave." Namiki Toko makes her dramatic debut—delivering intense, authentic orgasms in this must-see title!