Baka na Imouto wo Rikou ni Suru no wa Ore no xx dake na Ken ni Tsuite

Based on the erotic game by Pita Fetish!. The Mitsui family desperately wanted a girl, so when Mitsui Hana was born, her parents spoiled her very much. So when Mitsui Hana big became a very stupid person. Things to remember will forget when walking 3 steps, and he can not read the atmosphere, and al