SPOILER...
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I mean he's not dumbest but he just lacks common sense so much it's actually hilarious, normally everyone have sense of danger right..
Taekjoo does not have that or more like it's working only when he's already at death's doorstep
More Spoiler:
Until now I'm still laughing at the fact that he picked up unknown number while hiding from Zhenya and whole South Korea and even started speaking first lol
Or when he tried to cross freezing ocean in kayak
Or when he had rifle and could shoot Zhenya but he decided to run from him and got caught under avalanche
Another time when he tried to use paraglider but got caught in trees and hung up there until Zhenya found him, I'm dying
List goes on, that man have zero survival instincts
Just to let yall know but Taekjoo isn't smartest apple out there, he's actually pretty 'dumb' for spy, I'm saying this as novel reader but don't be disappointed by this story because it will never get "better"
This isn't love story at all, it was never intended to be