My own sister saw me masturbating in a younger sister erot*c game.... more>>

My younger sister, who always has a straight face, then somehow decided to help me m*sturbate. ……

She made my friends wank and even got the most beautiful girl in school to get involved.

Can I ever get a girlfriend now that I can only get off with my younger sister?

And why is my younger sister still watching me m*sturbate?

A popular web-based work has been completely revised and new scenes have been added!

*Main Storyline <<less

One day, my little sister saw me playing an eroge. She is my little sister who doesn’t usually do much. I thought she would definitely get angry. The words that came out of my little sister’s mouth were unexpected.... more>>

“Shall I help you out as an apology?” <<less

Say, Onii-chan—you’re really a hopeless siscon, huh.... more>>

After being seen busting one out on eroge about younger sister by his actual younger sister, for some reason, she is taking care of it with her mouth. Despite being scorned for having dispositions of lusting for his own biological younger sister, the play is becoming extreme; from titty f*ck, to loli cosplay bl**job, and even unprotected cr**mpie! Is this younger sister really going to cure her older brother s*xual disposition!?

*Alternate rewritten story exclusively for Bishoujo Bunko <<less