The Kingsman secret agency's Chinese and Korean offices are forced to collaborate once again, as they set off to investigate the doings of a mysterious underground organization called the Belaya Koshka. Agents meet after months of separation, old affections are revived, and amidst the lies and ghost chasing of espionage, the Kingsmen soon come to realise that the threat is much bigger than what they have initially imagined, and, not to mention, very different. A wild chase starts, cradled by the wistful song of the distant sea...

http://www.asianfanfics.com/story/view/1034550/lackadaisical-blue-exo-sehun-kaisoo-xiuhan-ot12-taohun-fanxing