hi.... i cant figure out which anime you are asking about but i can recommend a few which involve marriage..... they are also really great....
1 ) ituzarana kiss ( one of the best)
2) my wife is a high school girl
3) engaged to the unidentified
these are the only ones i can think of .... hope you'll like them...
if you find what you are looking for do tell me.... i like this type of genres...