AV director Kōichi Takahashi calls himself a "married woman's heartthrob." He lets his wife's female friend stay at his home with ulterior motives. There's no way nothing happens to the married woman spending the night alone with him... Wakako, 32 years old, married for 8 years, works in medical administration. She talks about the old festival at her husband's family home, where there's a tradition of free sex while wearing masks, and agrees to a proposal to put it into practice. Her body is toyed with by the masked married woman, and her breathing grows ragged. With a sloppy, wet blowjob described as a lewd licking technique, she voluntarily pulls her knees up to invite the penis deep inside, writhing in ecstasy. In the middle of the night, she has a climax-induced accident with a toy and gives an embarrassed smile. Then, the next morning, she sucks the penis of the married woman, gets taken from behind, and moans rhythmically in pleasure.