Name in Japanese: 佐伯耕四郎
Age: 27
Occupation: Wedding Planner/Match Maker

Koushirou joined the marriage firm Machida Marriage Consulting as a way to bring joy into other people's hearts. Unfortunately, his job has not brought him any luck with the ladies. His former girlfriend, Yoiko Akimoto, broke up with him because he was too distant. Now, his life is about to be thrown upside down when his sister moves into the household. Koushirou does not remember Nanoka much so his experiences with her will be just like a meeting someone for the first time.