A mysterious clinic called Premature Ejaculation Improvement Clinic sends AV actors on an undercover mission. In charge is the intelligent-looking Dr. Ota, who during the first session has the actor fail immediately, climaxing from blowjob and handjob. In the next session, he endures longer, advancing to sex training, becoming wildly excited by the doctor's sexy body and moans. Unable to hold back during intense cowgirl position, he cums inside the cute Dr. Kikuchi. Mastering vacuum blowjob and miraculous handjob techniques, the actor continues thrusting without climaxing during sex training, eventually shooting cum inside the female doctor in a semi-hypnotic state.