Female protagonist: Yu Xiaotong, a talented woman with a high IQ, who is cold on the outside and hot on the inside. Due to an accidental car accident when she was a child, she has always been responsible for the death of her father. A tough girl who grew up in adversity, in order to save people, she accidentally got into trouble with the male protagonist who took both black and white, and was forced to sign a seven-day contract, which led to a series of stories.
Male protagonist: An Leichen, the CEO of a multinational group, a business tycoon who takes both sides of the law. He is dark, cold, and ruthless. Outsiders can never see what he is thinking. He accidentally met the heroine. In the mood of teasing, he signed a seven-day contract with the heroine. Unexpectedly, he accidentally teased himself, and he lost his heart.
The second male lead: Wu Wang, who is a doctor to the outside world, but is actually a second-generation rich man, and even a second-generation official. He is a modest gentleman, because he is the doctor in charge of the heroine's father and wants to help her cure his father's disease. He has always liked the heroine silently, and later gave up medicine to go into business for the heroine.
Female supporting role: An Ran, who has been in love with An Leichen since childhood. She is the daughter of An Leichen's stepmother and the younger sister of Yu Xiaotong. She was originally a naive and arrogant young lady, but later she became jealous of An Leichen and fell in love with Yu Xiaotong, so she made a series of crazy actions.
Intention: As long as people are here, water will always flow, and this feeling will never end