Hana and Tetsuya, who lived in the neighborhood for a long time and were childhood friends, became siblings when their parents got married. Hana feels lonely when Tetsuya builds a wall for her because she suddenly became a family. Be surprised. Intrigued by her, he proposes to play her doctor again and let Tetsuya touch her own huge breasts. From that day on, she was made a brush with her younger brother's blue libido that she couldn't control.
