Living with her high school senior younger brother as a college junior, Ga-eun has been striving to remain undaunted while managing her studies and taking care of him ever since their parents passed away. Even though her recent breakup makes her uninterested in relationships, her resolution changes when she develops a romantic involvement with three of her brother's companions - Dowan, her playful and attractive childhood acquaintance, Sangu, the poised, dependable class leader, or Jun, the reserved yet benevolent and formidable one. Who will Ga-eun ultimately select?
