Makoto, an older sister who infiltrated her younger brother's school dressed as a man to help her younger brother being bullied. I succeeded in grasping the weaknesses of the bullies and stopping the bullying brilliantly, but at the very end, the bullies find out that I am a woman. Makoto who resists but is surpassed and falls into lust for the pleasure of humiliation. Even though he looked like a man, he couldn't resist the sex of a woman ...