The male protagonist is brought back from the countryside. His mother gives him one million every month, only asking him to cooperate in playing the mother-son act well, while the inheritance rights belong to the younger brother. The father intends to let him take over an arranged marriage, marrying an heir with a damaged reputation. The male protagonist treats life as a high-paying job, calculating every matter carefully. Meeting his fiancée for the first time at a bar, he happens to run into his ex and her best friend making a scene, and a comical contractual romance begins.