Perhaps because she married an older man, Tsubasa's married life has been neglected due to her husband's inability to perform. At such a time, her brother-in-law decided to come to Tokyo and stay with them for a few days. Since their wedding, Tsubasa and her brother-in-law had not met, and he harbored impure thoughts about Tsubasa's charm, accidentally witnessing her masturbating. Unable to restrain himself, when he approached, her unsatisfied body readily accepted him. From then on, in response to her brother-in-law's incredible virility, they both indulged in their carnal desires.
