From the Start, I Beheaded the Princess and Terrified My Father-in-Law Li Er!

[Historical high martial arts, wild ideas, unconventional choice System, immortal Qin setting, invincible from the start, beheading Princess Gaoyang, messing with father-in-law Li Er, crushing everything in my path for pure satisfaction] Fang Jun transmigrates to the Tang Dynasty and becomes Fang Yiai, the most famously cuckolded man in history. Bedridden with illness, he never expects Princess Gaoyang and the monk Bianji to put on an epic, marathon performance right next door. Fortunately, his god-tier choice System activates. [Option One: The Host vows to surpass his predecessor. Not only must he keep listening, he must offer timely advice in every possible style.] [Reward: One Imperial Green jade pendant. Effect: Once worn, the Host feels refreshed and invigorated, can pinpoint the direction of sounds, and sees everything in ultra-high definition.] [Option Two: The Host bears it for now and secretly informs Li Shimin. Reward: The Host successfully gets back on his feet and sprints all the way to the palace to report everything.] [Option Three: Patience is a virtue of ordinary people, and cowardice is a gambler's greatest taboo! Kill the monk dog in a fit of rage from the start! Cut the princess in half!] [Reward: A perfect replica of a heavenly-grade weapon spirit, the Imperial Heirloom Seal of Immortal Qin.] [If the Imperial Heirloom Seal senses that the Host cannot win, or that his life is in danger, it will immediately appear on its own. The Host will instantly gain a perfect replica of the full power of Emperor Ying Zheng, a ninth-rank Martial God.] [Unlock the Burial Coffin Dimension. Each time the Host gains a level, his divine sense can enter the dimension and open a blind coffin. The Burial Coffin Dimension contains countless suspended coffins, each holding all manner of rare treasures. Like mystery boxes, the coffins are never empty. What treasure comes out depends entirely on the Host's luck!] Fang Jun grinned. What was there to think about? This was no choice at all! So when his father-in-law Li Er rushed over and saw Princess Gaoyang's body cut in half, His Majesty Li Er burst into tears...