Happy Marriage!?

Chiwa Takanashi is a single 23-year-old retail worker during the day and a bar hostess at night, working to pay off her father's debt. One day, a rich businessman, Hokuto, tells her, "marry me and I'll pay off the debt", but Chiwa rejects his proposal. Later, Hokuto's true reason for marrying Chiwa is revealed.

Hokuto persuades Chiwa to get married and they are now officially husband and wife. Hokuto takes Chiwa to his parents to announce their marriage. His relatives give a cold response to the announcement because his mother is his father's mistress. A new part-timer at Chiwa's workplace, Yu Yagami, says he is attracted to her. Will this trigger a new love affair?

Chiwa witnesses Hokuto talking happily with Misaki, the intelligent and beautiful president of Michel Hearts. She also meets Hokuto's beautiful secretary, Taeko Soma, who tells Chiwa, "I know Hokuto better than you do". Chiwa decides to visit Hokuto's father, Seiji, at the hospital, but when Hokuto later finds out about this, he gets angry and tells her something unexpected.

Hokuto reveals that Seiji killed his mother. An accounting fraud has been taking place at Mamiya Fiber and Takayuki devises a plan to prevent Hokuto from disclosing this news. Chiwa sprains her ankle at work. Her coworker, Yu, helps her get home, and his kindness attracts Chiwa's feelings. Yu finds out about Hokuto's arrogant attitude and asks her why she's living with such a guy.

Hokuto and Chiwa are finally married. Hokuto is denounced by the Mamiya family because he humiliated their company by disclosing the accounting fraud. The relationship between Chiwa and Yu becomes awkward since she kept the marriage a secret. Chiwa becomes jealous of Misaki and Hokuto's relationship. Soon after, Hokuto and Chiwa's marriage is revealed in a tabloid.

Chiwa thanks Misaki for arranging the party, but Misaki says she did it for Hokuto, not her. Chiwa is now the corporate marketer at Yamaguchi. Chiwa accidentally sees an article about Hokuto and Misaki's relationship and is shocked to find they had been dating. She confronts Hokuto, but all he says is, "that was in the past. I only consider her a business partner now, nothing more".