"Sensitivity medicine" is a secret potion that increases the sensitivity of the private parts where it is applied while still maintaining rationality. The women who visited, lured by the word "free", fell into a trap! She is unknowingly smeared with a sensitivity drug, and her sensitivity skyrockets during the treatment! When she is held down by a group of people and assaulted by countless hands, she climaxes repeatedly against her will! Even though she really doesn't want to, she is made to cum over and over again, has a cock thrust into her, and climaxes while convulsing!