The key to charming your dragon in manhwa is through bravery and loyalty. Stand by its side in difficult times and prove your worth. Additionally, using special powers or gifts might help win its heart.
The live-in son-in-law storyline was about Ye Chen, the live-in son-in-law who was looked down upon by others. In reality, he was the eldest young master of a top family. In order to protect his beautiful wife, he had no choice but to return to the city and pretend to be a pig to eat a tiger. The story showed his growth and counterattack, as well as his relationship with others.