Not sure if this is the manga you are looking for, but when you said fox marriage this one came to my mind first - http://www.mangago.me/read-manga/ijimetaihodo_aishiteru/mf/v01/c002/2/
xD I read that lil bit ago really good! this was the one i was searching for tho...
http://www.mangago.me/read-manga/kitsune_no_tama_yobai/
Thank you *Hugs* ٩(๑❛ᴗ❛๑)۶
does anyone know if there's a kitsune tag? or have a fox list? I want to reread a story about a fox marraige I read a long time ago but its really hard searching for it T_T