After Mistaking My Childhood Friend, We Took Down the Tyrant and Became Lovers

[Melodramatic Plot! Not Political Intrigue!] [Two Male Leads] [Twists (?)]

Bai Rongguan, Crown Prince of the former dynasty (Bai, word-for-word, Rongguan), rescues the assassin Yun Xiaoming from pursuers on a rainy night. The rude fellow leaves without even saying thank you. The next day, the whole city is searching for the assassin. It turns out the assassin was sent by "Bai Zhu," the Crown Prince of the former dynasty, to kill someone. Wait, you're Bai Zhu, so who am I? Not only do I have to save the assassin, I also have to expose this impostor!