Sansha Mendan: Rensa Suru Chijoku Choukyou no Gakuen Ep 3

Aina is subject to more humiliation, being bound by ropes while wearing a leotard that is worn for gymnasts and gets sticks used on her. Unable to take it, she finally asks for it herself. She plans on regaining her dignity by setting the protagonist up again, but her plan fails as he already broke the girl that was supposed to see him raping her and report him.