[ Free Hentai Sex Manga ] Inshitsu Otaku Ni Ikareru Kanojo 03

He and his younger sister, Saki, have a calm existence. Though she's the object of his affection, his desire is becoming more irrational. One day, Saki confesses her love for him. For as long as I can remember, you've always been on my mind. They get romantically involved as a result of this. However, an email spoils their joy. ... I've seen all of your secrets. An attachment to the email shows Saki undressing and masturbating. Saki believes her stalker is responsible for the incident. He commands her in a variety of wicked ways. Her initial resistance quickly fades away as she becomes hooked on the drug... Saki's life is in the hands of Shuji.