The ml gets transported into a romance game he likes and becomes one of the two(? Maybe more) love interest(s) for a princess - he knows the future since he's played the game, and is aware of his adoptive (gets revealed later) brother, who's the competing love interest. Though he isn't transported to when the game was taking place, he wakes up as a child, a prince, so he wants to change the outcome of the game, since his character gets killed by the brother. I might be misremembering but one of the brothers are adopted, and the ml has brown hair. Sidenote the brother is afraid of horses.
The ml gets transported into a romance game he likes and becomes one of the two(? Maybe more) love interest(s) for a princess - he knows the future since he's played the game, and is aware of his adoptive (gets revealed later) brother, who's the competing love interest.
Though he isn't transported to when the game was taking place, he wakes up as a child, a prince, so he wants to change the outcome of the game, since his character gets killed by the brother.
I might be misremembering but one of the brothers are adopted, and the ml has brown hair.
Sidenote the brother is afraid of horses.