Her sons Ichiro and Jiro are Kokoro about Yuuki's huge K-cup breasts, who have been living with her since they were old enough to understand. Deep down, they want to have her all to themselves, but they can't make a move. However, their friend and cousin, who are visiting the house, get there first. Jiro happens to peek at what's happening, and says that it's his turn now... Yuuki gently accepts Jiro's cock with her K-cup breasts. When Ichiro finds out about this, he confronts his mother...