"Help me..." A heartless outdoor ring for a young girl. Masochistic feelings awakened by unreasonable humiliation and abnormal confinement. A girl who is unreasonably taken as collateral due to her parents' debt is trapped alive in a drum, and her heart is eroded as she is treated like an object and has to pay interest every day. In the drum that has become his home, he commits many shameful acts, and his body and mind are violated under strict 24-hour surveillance. Although she begs for "forgive me", her big breasts are too sensitive, the sexual act is rewritten into a lewd one with strong orgasms, and the big breasts are teased and stabbed. Where did she go after this?