This is not exactly the same as being married to one, but loving a female assassin while having some hidden agenda on his own...

AJTL has group of military brothers on a mission. They deal with a lot of dangerous situations, political intrigue and there is enough romantic plots to fill you up. This is slightly different as the brothers are not always together, but you see how they are guided by the common goal. Romantic stuff is in EB too, but I am on ep 19 so will have to see the end.
Liu Yu Ning plays in both, and the masculine is nicely balanced with the female subplots. 3 brothers, 3 women...

if you want to see more of the main lead actor, Yang Xu Wen , check out Love in Time . I know he played as guest in other dramas, but Eternal Brotherhood is the best I had seen him in and Love in Time is the second imo.