Spoiler
Just pasting this from Novel Updates so credits to the OPs
The MC ends with Edward, the blonde prince, his fake half-brother, I say it that way because they are not actually biological brothers. His real father is a nobleman from the kingdom of Sorbett, the queen's homeland and her master. The mc already knew this secret from the game, Edward or ML, discovers it from his father, but if I'm not mistaken, ML was already in love with mc even before knowing the truth.
To begin with, this begins with the death of ML's mother, she died in a carriage accident, caused by the queen, and well, the king also did the same to the queen when she left the safety of the palace
The MC ended up going to the Sorbett kingdom because the queen was killed in an accident while she was in a carriage, caused by the king. Then the king of Sorbett, the queen's older brother, was furious, so he asked for MC to be sent to make sure she was okay. This was something that Edward didn't want, he knew about the situation in that country. The king had no offspring, so there was a fight for the throne between the two dukes, and if MC went, he would be involved in this dispute. Well, to keep it short, the secret of MC's birth was discovered and he was going to stay in Sorbett to be the new king, but Edward managed to win the civil war that was in the country, which was orchestrated by the two dukes. In exchange, he asks for MC's hand in marriage, in the end, ML asks him to marry him, and MC accepts, that's how it ends.
Someone spoil me abt whats up w grey and mc like AND THE ENDING PLZ