A man kidnapped a bespectacled girl named 'Yui' and kept her captive in his house. He drugged her into sleep and took advantage of her defenseless state, indulging in his every desire. He sniffed her scent, fondled her pussy, and did whatever he pleased. When Yui woke up, she was shocked and panicked to see the unfamiliar man before her. She tried to escape, but the man choked her, forcing her to give up resistance. Terrified, she cried as the man raped her. And so, Yui was trained as the man's pet. He filmed their encounters and uploaded them online. After days of this cruel training, Yui gradually became aware of sexual pleasure and overcame her fear. Eventually, she began to crave dick on her own. Through spanking, fellatio, squirting, forced climax, and brainwashing, Yui gradually transformed into a creature that sought only pleasure...