Makoto, an older sister, Makoto as a man and sneaks into her younger brother's school to help him out after he is bullied. She finds out the bullies' weakness and successfully gets them to stop bullying her, but in the end, they find out that she is a girl. Despite her resistance, she is raped and the pleasure of humiliation makes her succumb to lust. Even though she looks like a man, she can't resist the female nature...