Des:[More than a sister...Always a friend...Less than a lover] A strange love relationship where she continued to have sex with her shut-in brother for 10 years, something she cant tell anyone about. ``Its not that bad...Youre my hero. Seeing his dark appearance, his younger sister tries to comfort him. One day, it turns out that she happened to see his erect dick in the morning, and he asks her to jerk me with your hands, and she cant refuse and ends up fucking him. From there, her demands escalate and the moment they cross the line...the dirty room becomes their secret base...