NMSL-015 I was treated like a toy because of my brother, who acted tough and kept hurling insults in an online game. Hinori Urakami

An otaku older brother who tends to stay shut in would act tough and hurl insults while playing FPS games. Because of that, one day he picks a fight with the son of a powerful yakuza boss, and they end up coming to the family home. There, Hinori is singled out in place of her brother. In front of her brother, she is forced into an intimate relationship and made to serve even during meals, leaving her heart in pieces. However, her young and sensitive body begins to accept it, and she gradually becomes more obedient. Where will the sister, falling into pleasure, and the brother, venting his anger, finally end up?