Mio is my sister, always in a messy room, her clothes are not neat, all day long she puts her face in the phone to the point of myopia. At this point, he completely isolated himself, locked himself in his room and refused to go out. A typical hikikomori. At first, I had no interest in Mio, but when I accidentally witnessed her masturbating, I discovered how beautiful Mio was! Even though I knew this was wrong, my sexual desire triumphed over my reason. I rushed into Mio's room, grabbing my beautiful sister. I thought Mio would resist fiercely, but no! Mio quickly joined me, enjoying sexual pleasure with me. After that, Mio was no longer withdrawn, she began to go out to eat with the whole family. My parents were very happy to see Mio gradually return to normal. But who knows, the two of us continue this extremely wrong relationship...