Onee-Chan no Yuuwaku [Final]

Yuu’s older sister Maaya is well known for being kind and friendly. He was proud of her and loved her as much as he did his younger brother. After a while, however, his constant ridicule turned into bad attempts. His actions became bolder and he had no choice but to follow. But there were no fears about their cowardly relationship; instead, it was quite a happy time with his beloved onee-chan.