It's a heart transplant. Like... yujin and hajun are related somehow. After that accident they took yujin's heart and transplanted it to hajun. I guess he had some heart disease. I've heard the heart can also store memories...so it's possible that's how he knows ganghui. It's also weird how the grandpa keeps commenting how 'The blood is important' like she isn't hajun's biological mom. I need more details...
It's a heart transplant. Like... yujin and hajun are related somehow. After that accident they took yujin's heart and transplanted it to hajun. I guess he had some heart disease. I've heard the heart can also store memories...so it's possible that's how he knows ganghui. It's also weird how the grandpa keeps commenting how 'The blood is important' like she isn't hajun's biological mom. I need more details...