Will You Become My Wife?

Vol.1: Yome ni Konai ka - Keigo is single and one day mentions that it would be nice to have a wife to greet him when he returned home. That day he comes home to be greeted by a smiling man welcoming him home, and the man says that he will be Keigo's wife! Vol.2: Gofukuya no Yome Vol.3: Ryoushi no Yome Vol.4: Wagashiya no Yome