Fuu's Things

So I once read a comic, this comic is about omegaverse, well I remember this omega has black hair, and this alpha has brown/blonde hair. And this omega, if I'm not mistaken, has a friend with benefits relationship with the alpha. Well, because the alpha is rich, this omega is told to stay away from the alpha by the alpha's mother, also because the alpha has a fiancé. But the alpha's fiancé is close to another guy. Oh, if I'm not mistaken, this omega is a police/detective, and because he is pregnant, he has to quit, there is a senior (maybe) who knows that he is pregnant, and this senior is the older brother of the alpha's fiancé.
Sorry if you don't understand, I used translation.