Yukiko Ihara, a 57-year-old married woman. Known as a glamorous lady, she possesses the ripe, mature body of a milf with beautiful big tits and a plump, shapely ass. After stumbling upon a suspicious website called "M Man Improvement Committee" online, she joined under the pretense of helping her pathetic male-masochist husband and her passive, herbivore-like son—but in truth, to satisfy her own sexual desires. Awakening her hidden aggressive girl instincts, she takes pleasure in guiding weak, timid men into becoming real men through intense, hardcore sex education. Her alluring presence captivates everyone who sees her.