Hapimari: Happy Marriage!?

Takanashi Chiwa is an office lady who works part-time at a club because she is in debt. One day, she gets into a quarrel with a wealthy and handsome customer who came to the club and is fired. The next day, a depressed Chiwa is summoned by her boss and finds the rude man from the day before down there. His name is Mamiya Hokuto. Hokuto suddenly proposes a contract marriage with Chiwa.
Although she is initially resistant to the idea, she has no choice but to accept. The two of them overcome all sorts of troubles and become a real couple.