I'm surprised that the teacher didn't fight him off and retreated instead she actually let Mie do her. I'm also surprised Mie didn't go inside Yuri at the three-way at the end but her hatred of men is now slowly disappearing thanks to Mie, he even let her do Fujisawa more than him after going inside her.
Even though I don't condone rape, I think it was satisfying for Mie to take his revenge on Fujisawa for treating him badly at work. First was at the bridge at night where he handcuffed both her wrists to the railing and even withstood a nutshot The second one where he blackmailed her into having sex with him and later having Yuri join in, so he won't tell anyone that she used the invisibility drug to steal the purse she wanted at a bargain sale.
