A high school senior, Jae-Kyung, stands to inherit a fortune from his deceased grandfather, but only if he graduates from a rural school, Boram High School. He reluctantly transfers there, struggling to fit in and use his wealth. His life changes when he meets Eun-Hwan, a unique and beautiful girl, and eventually falls in love with her, uncovering secrets that strengthen their bond.

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As Jae-Kyung approaches his 19th birthday, he must navigate a series of challenges to claim his vast inheritance from his grandfather's estate.