RBK-105 - After a long time, I reunited with teacher Mao, and she was being bound and suffering in secret… Natsuki Maron

The acting is a bit forced, but her tied-up body is gorgeous. Mao-sensei felt right, would've been weird if it was Maron-sensei, considering the lines. The headmaster (Shiradama Dango) shows up in geta sandals. Mao-sensei's nails and piercings are a nice touch. Lots of little things to comment on. Dango's advances are deliciously persistent (and I mean that as a compliment).