One day, Yumi received a letter from her son and pretended not to care as she opened it. Inside was a pair of full-body fishnet tights. "I was going to use these with my girlfriend..." he said, but Yumi snapped, "I never raised you to be such a pervert! I'm confiscating these!" and took them from him. However, that night, driven by curiosity, Yumi put on the fishnets herself. Immediately, her body trembled and arousal surged uncontrollably. "This feels strange... but somehow... my crotch... it aches... This is... I'm such a pervert..." she whispered, lost in sensation. Without realizing it, still wearing the tights, she began pleasuring herself right there in the changing room.