With Li Shimin as My Father-in-Law, I Married the Frail Princess Changle and Hit the Jackpot

I transmigrated into the Zhenguan era, and from the start I was handed the hardest quest.

I, Shen Mingxuan, a twenty-first-century overworked wage slave, opened my eyes to find myself marrying Princess Changle to bring her good fortune while she lay gravely ill!

Everyone thought I was a sacrificial offering. The imperial physicians said she had less than three months to live, the ministers were waiting to see me buried alongside her, and even Li Shimin, the fiercely protective father, looked at me as if I were already dead.

Just then, the “Marry a Noble Lady System” activated!

“Target detected: Princess Changle, eldest legitimate daughter of Emperor Taizong of Tang. Status rating: SSS+!”

“Congratulations, Host, you are now bound to the System. Daily sign-in rewards multiplied by 100!”

“What? She’s sick enough to die?”

“Try this life-extending elixir from the System.”

“Li Shimin wants to make trouble for me?”

“Then I’ll give my father-in-law peerless military manuals, potatoes and sweet potatoes, and a development plan for Liuqiu Island. Father-in-law, what do you think of me now?”

From then on, I spent my days admiring flowers, composing poetry, and helping Changle recover, while secretly offering Li Shimin advice at night and turning Changsun Wuji’s court schemes upside down along the way.

Three months later, Princess Changle had recovered, her complexion rosy as ever.

Six months later, the twenty-four heroes of the Lingyan Pavilion were lining up to become my honored guests.

A year later, Li Shimin patted my shoulder. “Good son-in-law, I’m glad my daughter married you!”

Later, Empress Zhangsun took my hand herself and said, “Yifeng, you also have a younger sister-in-law, Princess Jinyang. How would you feel about…”

My legs gave out on the spot. “Mother-in-law, are you trying to make me a professional imperial son-in-law?”