YEAH!
Spoiler
His Dad was a mighty general that the cruelty of the war give him PTSD. He met Ryeong as a baby, decided to adopt him and change his way of living. He then live in poverty with Ryeong has many complications as a sickly child. He never, even once has a harsh words or hands on Ryeong despite being a general that has faced many ordeals. I mean by that PTSD he can raise Ryeong with heavy hands, but he didn't. He truly loved Ryeong as his own. I still hate that brother & sister that made Ryeong separated with his dad in a cruel way. Despised it even more when I find out that traitor brother got to marry a woman that rule a place that connect the world and the underworld. I know he betrayed Ryeong to save his underserved sister, but damn! It is so unfair he get that life after ruining someone's.
Munryeong's backstory with his dad actually made me cry