Fang-Ju's grandma, Shu-Min, runs an old guesthouse. One day, Shu-Min accidentally breaks her leg, and Fang-Ju volunteers to tend to the guesthouse. A handsome lad, Allen, comes looking for accommodation in exchange for work. Fang-Ju takes him in with a motive. Allen finds a violin signed by Yamada Tomoo and admits to Fang-Ju that he is here for his ex-girlfriend who idolizes the said violinist.
Shu-Min runs a historical hot spring guesthouse called Happy Days. However, the guesthouse is unable to keep up with the trend of the times. Worse, Shu-Min falls down the stairs and breaks her leg. As no one can tend to the hotel, her granddaughter, Fang-Ju, volunteers herself instead of furthering her studies in the US.
Just when Fang-Ju is struggling to revive the hotel, a handsome lad, Allen, comes looking for accommodation in exchange for work.
Fang-Ju takes him in as she plans to attract customers to the hotel with his looks. Allen accidentally finds a violin signed by Yamada Tomoo and admits to Fang-Ju that he is here to win back his ex-girlfriend who idolizes the said violinist.