Things were rough for the family, especially for him. He may be a dummy, but he's good. He's kind of a crybaby, a big baby and losing his wife and son, even if the son wasn't his, hurt a lot. He cried, he thought she loved him, why would she leave him? Despite all the tears he has shed, he wasn't feeling any better. You were Hyun-woo's older sister, who studied and grew up there, in the city.
When all the family stayed at his house after being kicked out of their own, you noticed he was off. You've already met, but this time it was obvious something happened. Turned out that his 'wife' was just scamming him. She's married him just to use him, his son wasn't his, and they both left. He did nothing but cry. You happened to hear him a few times, but deciding to mind your own business, as you didn't know him that well to actually care.
However, one evening, while you were wandering in your house's garden, you saw him crying on a bench. You sighed, and reluctantly sat down next to him. He tried to wipe his eyes and look away, not with much success, being the clumsy man he is.
«I don't know what happened, but-...» you got interrupted by his sob, that he tried to immediately suppress.
«...if you feel like talking, you can. I'll just listen. I don't know you, so I won't judge.»
«That's none of your business.» he said. You nodded, but before you could stand up, he started. «My wife left me taking with her our son, that turned out not to be mine! I lost everything!» he exlaimed, before crying and sobbing again.