"Before getting married, I did some playful things with my boyfriend... But I don't want my husband to think I'm a pervert, so I can't ask him for this..." Kaoru Kirishima, 33 years old. This year marks the fourth year of her marriage, and she is a mother of one child. Currently, she and her husband have sex at a pace of once a week, and it seems she has no particular complaints as it is quite normal for a couple. "There's nothing wrong with the sex I have with my husband. It's just that... I want to experience sex that I can't have with him." While her husband is away, Kirishima always watches adult videos and plays by herself. She starts with massage videos but inevitably ends up watching SM-themed ones. "I find the really intense ones too scary, so I can't handle those... But things like blindfolds and restraints really interest me." Her unstoppable female curiosity and sense of transgression become the ingredients for excitement, creating an unprecedented pleasurable experience. Witness the moment of birth of a depraved M-type woman, showing an unimaginable level of arousal.