Mizuki and her boyfriend Kazuya have been living together, preparing for their upcoming wedding. Kazuya is thoughtful, kind, wealthy, and caring, but Mizuki is dissatisfied with his sexual performance. Her high libido leaves her unfulfilled, forcing her to secretly masturbate nightly. Before their wedding, Kazuya studies abroad in the U.S. for a month, where he meets Michael, who helps him greatly. When Michael visits Japan, Kazuya invites him to stay. Seeing Michael’s massive cock shocks Mizuki. Knowing her craving, Michael seduces her, and she can’t resist his size. They secretly fuck next to her fiancé, with Mizuki letting him cum inside her repeatedly. After Michael leaves, life seems normal until, just before the wedding, Kazuya finds a letter from Mizuki. She can’t tolerate his small, weak cock anymore. Pregnant with Michael’s child, she loves him and his huge cock...