Once undressed, it's a super erotic body! A plain girl who walks with a hunched back to hide her large breasts, which are a complex, is asked by a man pretending to be a masseuse, "Would you like to receive a posture-correcting massage?" As the man, who is actually an AV actor, heightens their sensuality, they become more feminine and start imagining sex! When they involuntarily accept his erect penis, they tremble all over and have multiple orgasms while spreading their armpits and having their spines stiffened!