Uno, who has been married for 15 years and has a cold relationship with her husband, has a mature body that she can't handle every day. At such a time, her nephew Yūki comes to Tokyo for his entrance exam... Yūki, who had refrained from masturbation for a year and was devoted to studying for the exam, but his determination collapses with Uno's voluptuous body, and his crotch swells violently. Uno, who happened to see it, reluctantly does it for him... While repeatedly handling Yūki's dick, which won't stop erecting due to the reaction of his previous abstinence, her body throbs intensely...
