Tokyo Renaikitan

Amano Chizu is a 22 year old teacher who had bad luck lately. On his way to school he met a person by the name of Natsume who is actually from the demon clan of the West. Natsume came to the human world to look for his bride who is called Ameno Uzumi No Mikoto who turns out to be Amano Chizu himself. It is said that Ameno Uzumi No Mikoto is actually a Wife to the Natsume clan and that the only way the clan can make children is to make love with Ameno Uzumi No Mikoto. Slowly Amano Chizu needs to learn who he truly is and understand that his life is anything but normal.
(From MangaTraders.com)