Akane Miyahara, a girl whose trademark is a ponytail and ribbon, is a cheeky junior who always says something bad about me whenever she sees my face. She is my sister's friend, so she often comes over to my house but on this day she rummaged through my room without permission, found some old love letters and made fun of me. I would have ignored her usual badmouthing but I really couldn't stand it when she made fun of my precious memories. Today, I will make her understand. However, even when her hands are tied and she is made to wear humiliating clothes and her breasts are fondled, Miyahara refuses to apologize. I never expected her to be this stubborn... And the punishment escalates more and more, until it is finally irreversible...