Okay, this my own speculation Like yohan's dad and daejong's dad are brothers and they both like daejongs mom but her mom end up marrying daejongs dad .so yohans dad his doing the same thing that happened with him and his brother to both of his son's with daejong the daughter of his brother.
Okay, this my own speculation
Like yohan's dad and daejong's dad are brothers and they both like daejongs mom but her mom end up marrying daejongs dad .so yohans dad his doing the same thing that happened with him and his brother to both of his son's with daejong the daughter of his brother.
FYI just my own thoughts.