well, it is found on chapter two i guess. Soo-wun witnessed or believe so that King Il killed his brother, Soo-wun's father
i think that is impossible since yona's father said he will not allow her and soo-woon to marry. my guess is if they were allow to marry soo-woon wouldn't have to killed her father in the first place. since he can only be king in two ways, 1. marry yona and become the next king and 2. kill the king and princess to become the next king he knew the king would not allow option number 2 so he killed the king instead. beside, don't forget he also killed the king out of revenge for his father. either way i see his good intentions but he's too slow in action. yona and her group is steps ahead of him in changing the world and trying to make it a better place. i just want to know if she will ever try to get the throne back and what happens to the rest of the dragons and hak. what becomes of soo-woon if she does? makes u wonder.
（￣へ￣）That's cause the king refused to marry her to Soo Won. And wouldn't be a very long story if that was the case!
I don't understand why Soo-woon needs to kill the king if he and Yona could just get married then he would still be the king with Haand Yona by hid side?