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A new request has been made to Mr. Shinobu, a great tutor who will surely improve the grades of any bad student. The student this time is said to be an idiot with all his brothers ... Mr. Shinobu expects that the Yaruki switch of the student boy who has excess libido is in the lower body. If you play with erotic gimmicks that make full use of the mature adult's body and give a secret reward, the virgin brothers will change suddenly! In order to have Mr. Shinobu accept the full of Ji Po, I will run for the first experience of my dream!