From Naono Holics Scans:

"Anyone will do. Find me someone who can get married immediately," Yamanouchi Morio said to his senpai, who works for a matrimonial agency. Maybe such a request would not have been so shocking, if it hadn't come from a man who had been a full recluse for the last 10 years.

However, his senpai, in his shock, makes a mistake and sends Morio a tall, blond foreign man who doesn't speak a word of Japanese and is running from a troubled past himself...!?