Read manga: Straight “Princess” In The Royal Palace

manga
Summary:

“I’m straight, so why would I be entangled in this mess with three male suitors?!” Because of an obnoxious ad for a game, the main character, Lu Xing, accidentally enters the world of an otome game. In order to return, he must gain the affection of three male characters?! The aloof lord, the mysterious assassin, the gentle royal guard — who will be his final pick? The survival of a straight man begins now…