Most interpret it as Sad or bitter -sweet. But my interpretation were it was a happy ending. Its really upto the viewer to decide if it sad or not. But most likely, it will be sad for you. Worth the watch tho...
I get the confusion of the sudden change of personality of Kanghan, but when you read the novel it was based on first, it wouldn't really be that surprising. I get enigmatic myself, I think their animosity should be more prolonged with some complexity of being enemies to tolerating each other... like that.
spoilers...
even if Sailom already had an eye on Kanghan preliminary to the event, I think he shouldn't really forgive him easily. But it's understandable when he easily forgave him due to his soft and easygoing attitude in the novel, and the writer choosing not to go astray with the novel.
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Its really upto the viewer to decide if it sad or not. But most likely, it will be sad for you.
Worth the watch tho...
spoilers...
even if Sailom already had an eye on Kanghan preliminary to the event, I think he shouldn't really forgive him easily. But it's understandable when he easily forgave him due to his soft and easygoing attitude in the novel, and the writer choosing not to go astray with the novel.