Yui, who has already lost her mother, lives with her father and younger brother, Maa-kun. One day, Maa-kun is ridiculed by her friend for having no sexual knowledge. The only thing she sees is that if she doesn't teach her correct sexual knowledge for her mother, she will try to teach Ma-kun about sex herself. However, since then, Maa-kun has gotten carried away.
![336KNB-295 [Fair-skinned Slender] A Slim And Elegant Wife Appears! She Plays With Men With Her White Skin, Long Limbs And Fingers! Anyway, It"s Beautiful And Erotic! Still, She Has A Cute Smile, And Her Nipples And Vagina Are Sensitive And Make Her Moan!](https://99avcdn.net/amateur/m/233934_336KNB-295.jpg)
