I Am the Tang Dynasty's Imperial Son-in-Law. Who Would Dare Disobey?

An alternate-history Zhenguan era!

Lin Yuan transmigrates to the Zhenguan era and uses the belongings he brought with him to save Empress Zhangsun. With no other choice, he becomes a prince consort, while the heroine is Princess Gaoyang, a pioneer in pursuing free love in a feudal dynasty and a symbol of extramarital romance.

Princess Changle, may I recite a poem for you?

Wu Meiniang, you can lean on my shoulder!

Li Shimin: If you weren't still useful to me, I would have given you a cup of poison.

Li Zhi: Why do I feel like I've lost so much?