Choi Hangyeol is the grandson of Chairwoman Park of Dongin Foods, a company that has a thriving coffee business. He has never had a job and does not care for responsibility. Hangyeol is hung up on his first love, Han Yoojoo, who only sees him as a friend. Go Eunchan is a 24-year-old tomboy who is often mistaken for a guy. Her father died when she was 16 years old and since then she has taken over as the breadwinner in her family. When Hangyeol and Eunchan meet, he, not knowing that she is a girl, decides to hire her to pretend to be his gay lover so that he can escape the blind dates arranged by his grandmother. After getting an ultimatum from his grandmother, Hangyeol takes over a rundown old coffee shop, later renamed "Coffee Prince," to prove that he's capable, to both his grandmother and Yoojoo. In order to attract female customers, he only hires good-looking male employees. Eunchan, desperate for money, continues to hide her gender to get a job at the Coffee Prince.

Season 0 of House of the Dragon premiered on August 28, 2007.