MUDR-373 I discovered her secret... Riku Ichikawa, a beautiful girl in a school uniform who enjoys bondage and training at school.

Riku-chan is a serious and cute class president. I was curious about her, so one day, noticing her acting strangely, I followed her into the gym storage room... and there I found her, bound with ropes, happily spreading her legs—the class president in a lewd state... Realizing she was a masochistic sex slave who enjoyed being tied up and trained, I became sexually aroused. Unbeknownst to me, something was happening on school grounds...