The King's secret
Once there was a king in a distant land that had two children, one was a legitimate son and the other had arrived in a float from another kingdom, both were raised without knowing it.
At the time of welcoming the child as his son, a document was created that made clear the whole process that had been carried out so that he had just arrived as a member of the family, this document so important but so dangerous was kept without the care that should be necessary, this document was exposed in the library of the kingdom.
the children coincidentally were the same age, the same birthday and as they grew they began to notice the difference in their physical features despite being "children of the king" and understand that only one could reach the throne, the rivalry did not occur to wait, it was an immense kingdom and with many riches but neither of them had in their hearts the desire to share, both were looking for some pretext to be able to say who was the heir of everything that was in the kingdom.