The Poor Scholar’s Live-In Son-in-Law

He transmigrates to the ancient Kang Dynasty, a place he'd never even heard of! He becomes the son-in-law who is all the rage in novels from the future. “Your three years are up. We respectfully welcome the Dragon Lord out of seclusion!” So this time, he's going to play the smirking war god himself. “Since that's the case, I won't be your son-in-law anymore!” Wait!! Why is the house bare, and why are they living in such poverty? Looking at his frail young wife, managing the household all by herself, how could he bear to leave her?! All right, then. He'll keep being this family's son-in-law. Watch as a poor son-in-law works hard to build a livelihood and find love in the Kang Dynasty! (P.S. A lighthearted story with a simple style!)