I Became the Tang Dynasty's Imperial Son-in-Law?

After transmigrating to the Zhenguan era, am I really going to become Fang Yiai, the Tang Dynasty's most notorious cuckold?

Neglecting a peerlessly beautiful woman, the daughter of the God of War, while wholeheartedly and selflessly fawning over the arrogant, domineering Princess Gaoyang, without asking for anything in return??

Fang Yiai firmly says NO to this course of history!

Let's start from the lost Eighteen Riders of Yan Yun!!!

Ding! Congratulations on activating Three Choices!

1. Accept the identity of Fang Yiai, whose soul has taken over the body! Reward: the lost Eighteen Riders of Yan Yun!

2. Reject the identity and be sent back to the 21st century! Reward: ten million in cash!

3. Choose to die in an explosion! Reward: entry into a xianxia world!

This novel and its characters are entirely fictional. Any resemblance to actual people or events is purely coincidental. Do not imitate.