Help me find this manga

I've been searching for this manga for an hour... The only thing that I can remember is that the uke, which was a lot older was sold off?? (I'm not sure about this part) to marry a child, who's supposed to become the king in the future. Shit happened and they thought that child died (was assassinated?) But he's still alive and he lost his memories. The uke was then kicked out of the palace by the seme's older brother (or maybe he left by himself idk and I can't remember) and started a rebellion of some sort. Years passed, seme was all grown up and he met the uke once again during the rebellion...