I have read this manga over and over. Part of me screams internally due to the red flags of their toxic relationship, but actually they had never loved before. Who are they?
Takanashi Chiwa is an ordinary employee with little experience about love whose life had been populated by unreliable men, starting from her father. In fact, he is gullible and easily gets into trouble until one day Chiwa's mother leaves the house and divorces him. All the problems, all the debts are taken over by Chiwa who chooses to work part-time as a cabaret girl, as a side job.
One night, a new client requests her service and offers to shoulder her six-digit debts out of the blue and starts looking down at her in a clumsy but uppity attempt to court her. Chiwa throws diluted whisky at him, fueled by her own pride, and faces him upfront. The client leaves.

The day after, the president of the Mamiya Company where Chiwa officially works, Mamyia Hokuto, summons her to his office. To her utmost shock and surpise, he happens to be the client of the cabaret. But he is not alone: in that room she finds an old admirer of her departed grandmother. That other person is the chairman of the company and offers her to shoulder her debts under one condition: Chiwa has to marry his grandson Hokuto, right there and then, and that will allow the president to keep his status and position, and eventually inherit the whole Mamyia Group. The girl accepts reluctanly (also persuaded by Hokuto) and starting that day, Hokuto and Chiwa live as husband and wife in secret.

What is going to happen to that couple who has nothing in common but a contract? Can there be love between them? Will they grow further apart?