A popular comic by ultra-popular author Ririko Kinoshita! Reimi (Ririko Kinoshita) is soon to marry her boyfriend Masao. However, her despicable uncle Shimotsugu is not happy about this and has a plan... Reimi falls into Shimotsugu's trap and loses her virginity, which she had been saving until marriage. However, Shimotsugu is not satisfied with just taking her virginity, and he greedily subjects her to pleasure training to female body modification. Reimi writhes in agony from the pleasure she has never experienced, and before she knows it, her sensitive body is craving her uncle's cock...