I don't know if this is what we are supposed to assume from the whole ending, but in the river they decide to share the burden of the accumulated bad karma together. Id really really like to think that this ends up saving them because Mujin has accumulated so much good karma by saving all the people in his life, that it was able to balance out the bad karma that was unloaded on to Wuyeon. Like him being the type of person that he is very truly is what saved them. That interpretation brings me a lot of joy, but those are just my thoughts hehe.
I don't know if this is what we are supposed to assume from the whole ending, but in the river they decide to share the burden of the accumulated bad karma together. Id really really like to think that this ends up saving them because Mujin has accumulated so much good karma by saving all the people in his life, that it was able to balance out the bad karma that was unloaded on to Wuyeon. Like him being the type of person that he is very truly is what saved them. That interpretation brings me a lot of joy, but those are just my thoughts hehe.