Satomi Mana is a sheltered young lady who attends a certain famous private girls' school. I saw a man who looked depressed and called out to him with the intention of helping him. The man turned out to be a leader of the secret female body training club "Inkaku". An innocent and beautiful girl falls into a trap and becomes the prey of perverted, sadistic old men. The beautiful girl's body reacts to the overwhelming torture and she is transformed into a masochist. Mana smiles with joy and devours the penis.