Gong Shim lovely tells the love story of 2 sisters and 2 men. Gong Shim (Kwon Min Ah), is a girl with a warm heart, but always living under the shadow of her sister Gong Mi (Seo Hyo Rim) is beautiful, smart. Meanwhile, Ahn Dan Tae (Nam Goong Min) is a man living in an apartment on the rooftop, carrying the level of a warrior. Then Suk Joon Soo (Oh Joo Wan), who comes from a venue for a tycoon group. The two men differ in all aspects but have a concern with the same girl, Gong Shim.