There was a woman named Mari who had never had a boyfriend in her 23 years of life. She looked cute and had a gentle personality, yet romance never came her way. One day, her kind elderly neighbor introduces her to someone new—a manly, wild, and rugged guy. Mari instantly falls head over heels for him. However, his body is slightly small, and she finds him a bit unsatisfying. That's when she hears a strange rumor about a "magic pond." It's said this pond possesses mysterious powers—when you drop something into it, unexpected miracles happen. Curious, Mari drops her boyfriend into the pond. Suddenly, a miracle occurs. A goddess emerges from the water and asks, "Which one is your man's dick?" Without hesitation, Mari picks her ideal type and pulls—and a brand-new man appears. In that instant, Mari now has two boyfriends. She loves them both and can't choose between them. So she drops her boyfriends into the pond again, selecting her preferred men over and over. Each time, the number doubles—soon she has four lovers. Unable to decide, nonstop sex begins around the clock. Rotating partners, endless coupling—a wild, unbelievable yet true story of one curious woman.