Uchi No Otouto Maji De Dekain Dakedo Mi Ni Konai

The protagonist of the story is an ordinary Japanese guy who suffers greatly because of his complexes. However, with all his complexes and shortcomings, he has one “dignity of a huge size” that his sister Chiaki has been dreaming about for a long time. One day, she decides to throw a sex party for her brother with her horny friends Nagisa and Yukiko. That evening our hero lost all his complexes…