【More than a sister... less than a lover】For ten years, she has been secretly taking care of her brother's sexual needs. 'It doesn't feel gross... because big brother is my hero.' The sister tries to comfort her brother who has turned into a shut-in. One day, she accidentally sees his morning erection and is caught, then forced to 'jerk him off with her hand' and can't refuse. From there, the demands escalate, crossing the line... Their filthy room becomes the secret base for the two of them.
