Manabu has admired his friend’s mother Yurine since childhood, but she rejects his confession. Determined to lose his virginity, he visits a married-woman brothel and discovers that its top worker is Yurine herself. Worn down by his pleading, she reluctantly gives him an unforgettable first experience. Addicted to the pleasure, he becomes a regular, visiting almost every day and secretly continuing their creampie affair at home.