The older brother is a shut-in and a gloomy person. The younger sister is an active and beautiful girl who is popular at school. Although they are siblings, they have completely opposite looks and personalities, and the younger sister hates her older brother and insults him, telling him not to leave his room. The older brother suddenly loses his temper and rapes his younger sister. The younger sister resists and glares at her older brother, but she cannot resist the older brother's pent-up frustration and sexual desire and ends up being raped...