It was officially scanlated by a group once and had a funny sounding title. Anyway, there is this young tween/teen boy wearing glasses who goes alone into a public toilet where he sees a sexy older teenage/twenty-something girl wearing bondage lingerie who seduces him and she has him urinate into her vagina when they are done. At the end, she suddenly says "Master" and the boy is frightened that there may have been someone watching them all along but she then explains that she means that a boy like him is worthy to be her master.