maybe this one?
http://www.mangago.me/read-manga/kekkon_shite_kudasai/
I think it’s called hyacinth I could be wrong
If its yaoi manga 100% sure its Kekkon shite kudasai.
Yes! Thank you. This is it.
It is. Thank you very much.
That's not the one but thank you! I don't know this one. Gonna read it ^^
Yaoi manga, omegaverse. Omega guy is keeping a secret about the father of his child.
He meets him some times (the alpha guy) but doesn't tell him that he is the father. In some time the alpha guy will guess right that he is the father and then they are happy together like a family (I think that the family of the alpha guy don't like the omega one. Not sure tho. Maybe different manga )
It's not Dear Benjamin (if you don't know it, you must read it).
Please help?