Manabu has long been in love with Ruka, the mother of his childhood friend Makoto. When an impulsive confession ends in rejection, his desire only grows stronger, so he visits a married-woman brothel to forget her. To his shock, the number-one woman introduced to him is Ruka herself. She awkwardly suggests he choose someone else, but believing this may be his last chance, he kneels and begs her to take his virginity. The overwhelming pleasure soon has him seeking her out wherever he can and repeatedly creampieing her.