[Natsu Tojo x Bondage Exposure] A girl who was interested in an SM book she picked up by chance and got excited about being tied up and seen, hid outside and indulged in shameful masturbation. One day, she was found by the janitor while exposing herself at school... The girl, who discovered the pleasure of exposed sex, became absorbed in more extreme exposure play... A work of awakening and training a perverted masochist, exposing perverted shame everywhere, at school, in the library, in a cafe...