It is your average over-exaggerated anime. You have seen it countless times but you cannot exactly put your finger on it what anime it reminds you off. You will find similar character archetypes just in different settings reacting surprisingly not very surprising ways.
But that's not always a bad thing especially if this is the first time you watch these kinds of anime.

So the protagonist is a famous Spy who is considered the best in his league. His job is to do anything by any means to stop a war accruing between the west and east.
His latest operation is about to make a Family to get close to his newest target. Which is how we get introduced to our next main character Anya, who can mind read, which the Spy who now goes under the name Loid adopts.
He would later "marry" Yor, an undercover killer. Besides Anya, nobody knows about each others secrets.

This is where the hilarious part starts.
Loid has to figure out how Anya can get 8 Gold Stars, Stella, within a month alongside the son of the target so he can get closer to him and finish his job. It is also interesting to see how each character tries to adapt to the new lifestyle.
You have your emotional moments from time to time, but the main story usually takes a back seat compared to the comedy and setting. How the characters try to cover up what to us as viewers seem to be obvious.

The characters are really likeable so far.
Anya Forger feels and acts like a kid and despite her ability she doesn't always find solutions to each problem (as of the writing of this review).
Yor Forger is an airhead and usually believes whatever she is told. She really does her best to be a good family member.
Loid Forger has trouble to view things from the perspective of normal people which lead to some fun moments. But he is adapting and the family life seems to affect his usual decision making.
There are other hilarious characters like Franky and the Headmaster.

The animation is good and pleasing to the eye. And it also sounds great. The cinematography is also great with the touch to detail.

Comedy is fine. Some of the jokes get set up with a pay off at the end. But there are also jokes that play with viewers expectation when it appears someone inherited something from another character like a habit or their will being strengthened only to face the harshness of reality.

It's a very enjoyable series, but not something I will remember once a new season will start. Being a continuing story helps obviously but it's not something I would call a masterpiece. Just like how people will forget about Kaguya-Sama and some other shows.
At least it's not a school setting... oh, there are schools in this show. Well, nevermind.