Way of the Househusband starts with Tatsu and Miku already married. So far (I am on Volume 3), I haven't learned how they met (not sure if I ever will). Tatsu is already established as a "given" with his in-laws, who seem to accept him as much as they would accept any son-in-law. The father worries about how to entertain Tatsu and resolves to play catch with him!
The great thing about the marriage is how utterly matter-of-fact everyone is. When Tatsu decides to take out a roach, he commands Miku to help him, even if it means hitting him. She does so with slapstick results. He doesn't mind. They move on.
It is heavily implied that Miku not only is terrible at housework (she's a working wife), she finds household chores tedious (Tatsu revels in them). When Tatsu tries to get her to relax with incense and an eye mask and kitty cat, she feels completely confined and goes to take a bath instead.
Tatsu, on the other hand, blisses out.
Yet Miku loves cutesy things (very specific cutesy things), which her husband will go out of his way to make sure she enjoys. And she has a sweet lovingness that leads her to give her husband a day at a carnival.
Their complete acceptance of each other's oddities--even if they both think the other IS a little odd (and other people think they are both quite odd)--makes them a great couple.