In this title, married woman Mizushima Ai experiences anal orgasm for the first time. Surrounded by the esthetician's gentle yet bold finger play, she gradually loses all inhibitions, her mind and body completely liberated. Her anus is stretched by fingers and a vibrator, intensifying her sensations as she adapts to the expanding pleasure. Then, a massive cock penetrates her, and this refined lady, despite her elegant demeanor, exposes her vulgar, lustful side as she is overwhelmed by pleasure, climaxing repeatedly. This work realistically captures the transformation of a married woman experiencing new sensations and her intense descent into ecstasy.