Sa Hara has been going through a bit of a dry spell…a 29-year one, to be exactly. All she wants is to be able to enjoy her raunchy rendezvous, but no man seems to be able to find a way to satisfy her. In the throes of desperation, she makes a wish upon a fountain that is rumored to grant one’s wish – with a price. That very same night, an unexpected visitor comes to give her a truly magical experience!

In a quiet countryside village lies an ancient, family-owned hot spring, passed down through generations. As it prepares for its grand reopening, Jinho is suddenly left to run the bathhouse alone. His only help? Sejeong, the gorgeous girl next door. As they work together to deep-clean the place, they stumble upon a mysterious bundle of herbs and an old medicinal book in the storage room. When they brew a vibrant, green herbal bath from the fragrant herbs, something unexpected begins to heat up—and it’s not just the water!