After 15 years of marriage, Uno's relationship with her husband has gone cold, leaving her mature body constantly unsatisfied. Then her adult nephew Yuki comes to Tokyo for an exam. He has avoided masturbation for a year to focus on studying, but one look at Uno's voluptuous body destroys his resolve and leaves him visibly hard. She reluctantly gives him a handjob after noticing. As she repeatedly services his erection, which refuses to subside after so much abstinence, her own body begins to ache with desire, leading to three creampie scenes in this adult aunt-and-nephew role-play.