Suga, the tutor who comes to her son's house twice a week, has fallen in love at first sight with Nagisa, a beautiful and ripe mother. Whenever his son isn't looking, Suga approaches her with a "kabedon" (a kabedon), and Nagisa is taken aback by the bold behavior of the honest and handsome Suga. However, the moment he forces her to touch her crotch, Nagisa is shocked. It's a "huge penis"... The only thing that has never been satisfied by her husband's penis in her happy, carefree life is Suga's young and powerful penis, and she gradually becomes addicted to the pleasure it brings.