Moriyasu Akashi, medical equipment rep, is queasy at the sight of blood. However, Nobuaki, a surgeon at one of the clinics his business deals with, spoke profound words on how his discomfort might not be because he dislikes it. One day, Nobuaki forces Akashi to be hospitalized, and while in his grasp, informs him during a visit to his hospital room that he will teach Akashi about his true self?! The diary of the hard and sweet training by a sadistic surgeon who enlightened a shy young man to his masochism.