Her busty, slim body is tied up and violated! She is tied up and left alone, unable to hold back and urinating. She is fed food like dog food, and is mercilessly trained with a wooden horse and a crotch rope, until she is completely submissive. She offers her body to him and falls into pleasure... Mion, who works at an advertising agency, is in charge of planning a motorboat race and comes into contact with Togawa, the organizer. However, Mion is deceived by Togawa, who has a perverted hobby, and is tied up so that she cannot move and is raped...