Married woman Reiko has always devoted herself to fulfilling her boyfriend's desires. But today, his demeanor feels different, as if he's seeking something special, making her heart race. As he showers her with dominant words, he inserts a finger into her anus and attempts to push in a vibrator. Embarrassed, Reiko instinctively closes her legs, but determined to please him, she forces them open and submits to his demands. She willingly takes his cock into her anus. A pleasure unlike anything from a vibrator surges through her body. Unable to resist the intense thrusting, she climaxes. Overwhelmed by such intense pleasure, Reiko collapses, unable to move.