While masturbating to an eroge game featuring a younger sister, I was caught by my actual younger sister. My always serious sister then started to help me with my masturbation for some reason... Can I ever make a girlfriend when I can only climax with my sister!? And why am I still being watched by my sister while masturbating!? This ultra-controversial work, which won first place on FANZA, depicts the conflict of a brother who can only climax with his sister and their twisted relationship, now adapted into live-action with additional original sex scenes under the supervision of the original author.
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