STAR-918 Toda Makoto's disguise as a male is exposed and she gets gang-raped...

My older sister Makoto disguised as a man and infiltrated her younger brother's school to save him from being bullied. She took advantage of the bully's weakness and succeeded in stopping her bullying, but at the very end, the bullies found out that she was a woman. Although she resists, she is humiliated, and Makoto falls into lust for the pleasure of her humiliation. Even though she looked like a man, she couldn't resist her sexuality...