That's pretty common with these games. Another manwha-based MMORPG, Redmoon Online, had little in relation to the work apart from the background, theme and characters. So if you didn't like the manwha, it doesn't mean you won't enjoy the game; unfortunately, the reverse also holds true.
Faith is what credulity becomes when it finally achieves escape velocity from the constraints of terrestrial discourse- reasonableness, internal coherence, civility, and candor. Thus, the men who commited the atrocities of September 11 were neither cowards nor lunatics of any sort, but Men of Faith- perfect faith- and this, it must finally be acknowleged, is a terrible thing to be.