Manga by author Asakura Hayate

My very own little sister caught me masturbating to a little sister Eroge game,then my cool, calm and collected little sister suddenly decided to help me mastu*****...She even made my friends mastu*****, and somehow got the most beautiful girl in school involved!?Will i be able to get a girlfriend if i can only c** to my little sister!?and also... Why is she still watching me mastu*****!?