More than a Married Couple, but Not Lovers.

More than a Married Couple, but Not Lovers. is also listed as Fuufu Ijou, Koibito Miman. on some trackers — same show, different title convention. It's a TV series across 12 episodes out of studio MOTHER. It's finished airing, so the whole thing is watchable start to finish.

On the shelf it sits under Comedy, Drama, and Ecchi — worth knowing if you're comparing comedy anime specifically. If More than a Married Couple, but Not Lovers. works for you, HAIKYU!! and Rascal Does Not Dream of Bunny Girl Senpai are close matches — see the full related list below.