Renai Kekkon no Hosoku

Asako Nakajima, who works for a major beer company, is still a single office lady while her friends are getting married. One day, Asako was transferred from the Consumer Complaint Center, where she had been working for 10 years since joining the company, to the sales department, but she continued to make mistakes due to unfamiliar work. One day, after being introduced to a dating agency that her mother had secretly registered with her, she met Kozo Hamasaki, a tracer of a rural liquor store.
(Source: Japanese = Wikipedia || Transltion = MDL)