OK so, bro. I'll be honest here, I really liked the manga, but the first few chapters were hard to read. At first you think like "HE IS A CHILD, MAN", there are things that were really uncomfortable to see, but if you put yourself in the shoes of the protagonist, who had the misfortune of his destined partner being A CHILD, you will see that the guy couldn't do much on the situation, because in the world of the omegaverse hormones dominate your mind. The real problem was that the two met too soon (while one of them was in elementary school), and that left thedevelopment of their relationship wrong and awkward. But if that reassures you, they made a wise choice so that the relationship wouldn't end up being a crime, and the last chapters are very nice.
Well, anyway, if you can withstand a bit of a soul fracture, I highly recommend it, the ending will heal your fracture (it's pretty cute, or... hot)
I did my best to not include any spoilers here, give this manga a try!! Enjoy it.