After his parents die in a car accident, Lee Eun-woo is diagnosed as an omega. The life ahead of him is already dark enough, but how can he even be diagnosed as an omega…? With the CSAT (College Scholastic Ability Test) getting really close, Eun-woo is struck by his heat and the alpha Kang Shi-hyuk appears before his eyes. He makes a proposal to Eun-woo. “This is a simple contract.” “I need an omega, and you need money.” A love story that begins with a contract.