Comment by Wapwhopper on Codename Anastasia - Chapter 29

I'm not sure if this is a 100% accurate, but Zehnya became more obsessed with Taekjoo who's in the hopes of arresting the mastermind a.k.a bognadov(?) or finding the Anastasia. The both of them went to the (idk who's it cause I forgot)'s room, There they found a secret room which lead them to where the family portrait of Bognadov's(?) are. Yet the face of him were never found, Taekjoo gathered all his thoughts before zehnya spoke. "Do you really believe that there was Anastasia?"

(Okay this might not be the best explanation since I really forgot the plot. But yes, we got a happy ending in the end. But don't get your hopes up since the agency where taekjoo works is the one who sent taekjoo in russia to be killed by the hands of a psychopath/Zehnya(?)
Warning tho I don't know if this is the real plot or not. It's been long since I've read the novel)

Zehnya and Taekjoo infiltrated in a mansion to look for the Anastasia, Taekjoo was in charge of looking through the room of the owner, which he "seduced" and then knocked him out. (the owner actually tried to lure him into a trap so he leads him into his room and drugs Taekjoo but the drug doesn't kick in quite fully until later.)