Living with her older sister Shoko Takahashi, who has big and charming breasts, and is extremely lewd, it seems that his younger brother has become a living sex doll for her. She often didn't wear a bra to show off her big breasts, she showed off for the young neighbor to see, then she dragged him into the house to serve her sex, and then even my brother didn't spare me, he was an adult, how could he stand the charm, lewdness, so he also became the one to satisfy her, and she became the teacher who taught him how to bring women to the top.