18 years old who wants to be tied up. Karen, a high school girl who serves as the student council president, finds out about the existence of the SM club that is secretly operated at school, and accidentally peers into the SM world. Through the experience of being a slave, she releases herself as a masochist, and eventually becomes immersed in that world every time after school comes... Club activities of an 18-year-old who devotes her youth to SM, all 4 volumes.
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