The Wild Man of the Frontier

Traditional Alternate-History Setting, Live-in Son-in-Law, Multiple Heroines, Decisive and Ruthless, Satisfying.

Special forces soldier Zhang Xuan transmigrates into the body of a scholar in Great Qi. By chance, he's "claimed" by the twin sisters Mo Yue and Mo Xing of the Dragon and Tiger Stronghold, and forced to become their live-in son-in-law. He thought he'd be enjoying a comfortable life with beautiful women by his side, but instead gets caught up in the Mo family's revenge and the war against the northern barbarians. Relying on the martial arts and cunning he brought from his past life, he makes a name for himself at the stronghold and fights his way through a chaotic age, embarking on the wild legend of a live-in son-in-law on the frontier.