As a university student, I was visiting a friend's house one summer. While we were frantically working on an assignment, my friend's mother, Satsuki, brought us tea. I couldn't hide my surprise at Satsuki's beautiful face, no bra, and exposed nipples - she was completely defenseless. When I told my friend that the bathroom and toilet would be unusable from the next day due to plumbing work, he arranged for me to stay with him for two weeks. However, Satsuki was not wearing a bra at all. Despite managing to keep my composure, I couldn't help but succumb to the unconscious temptation of her exposed nipples...