I'll get right to the point: A Couple of Cuckoos is a rom-com with a harem tag. This anime isn't original or feel particularly different from other animes, but that doesn't mean it's a terrible one; I'm just bringing it up for readers who might have been hoping for something different.
Nagi Umino, the male main character, isn't the loser/virgin kind that you typically see in those kinds of animes; instead, he resembles characters like Hachiman in Oregairu and Fuutarou in Gotoubun. He is frank and won't hold back when speaking his thoughts, which occasionally lends the show more credibility.
Everything feels coherent about this program, except for the opening scene where the baby switches things at birth. Of course, achieving such a feat doesn't seem difficult in a slice of life environment, but I'm trying to emphasize it because it's executed better than in other rom-coms. (Mostly, I'm thinking of the character profiles; each one makes sense, and the manga/show honors the characteristics assigned to the characters as the plot progresses.)
There is brocon in this show. To clarify, note that there are no sexually suggestive scenes in the show (which, incidentally, doesn't have a lot of fanservice), and there's always the standard justification that the siblings aren't related by blood. Still, I'm classifying this as a con because some viewers will find the show offensive for this reason alone.
Although that's a bit of a double-edged standard, I don't think the plot moves forward at a particularly good speed. You will like every episode and be happy that there are 24 of them if you like the characters and the overall feel of the program. However, if you are hoping for some rapid character development, plot twists, and other things, you will be quite disappointed with or bored with the show.
Overall, I would suggest A Couple of Cuckoos to anyone who appreciates romantic comedies. The show really has a cast that is fairly intriguing, and the character dynamics feel cohesive, which makes the tale easy to follow and makes you fall deeply in love with your favorite character or characters. The primary issue with the show is its rhythm and duration; in my opinion, there may not be enough action in 24 episodes, therefore you should not bother watching it if you're looking for an anime with a strong narrative. In addition, there is some brocon in this show-nothing too offensive, but it's never a good idea to see that kind of thing.
