My father ordered me to kill the emperor, but His Majesty bestowed a princess upon me instead.

My father was a rebel, and he sent me to the capital to kill the emperor.
I disguised myself as a candidate official, just wanting to live a low-key life.
But in the imperial palace, the emperor stared at me, his gaze resounding throughout the court:
"I believe you."
He immediately bestowed upon me an official title, granted me a luxurious mansion, and arranged my marriage to Princess Zhaoning!
I, a regicide assassin, became the emperor's confidant and the emperor's son-in-law overnight.
The house is a cage, the princess is testing me, the guards are watching me closely, and my father is forcing me to kill.
The emperor knows perfectly well who I am, yet he still favors me, trusts me, and protects me.
Walking on the edge of a knife, I held the knife that was meant to kill him, yet I became the person he trusted most.
"Your Majesty, I've come to kill you."
"I know."