They're "brothers" in arm, as in they grew up together and were very close. It's not uncommon in east asian cultures to for guys to consider their close childhood friend a "brother" (esp in ancient times)!! If you go back to ch 33, it says that they were "as tight as brothers".
they are cousins at least, else how is taehee his sister? it says he is the only kin left alive by yoo hyun, the emperor, and that he is of the same extended clan.
They're "brothers" in arm, as in they grew up together and were very close. It's not uncommon in east asian cultures to for guys to consider their close childhood friend a "brother" (esp in ancient times)!! If you go back to ch 33, it says that they were "as tight as brothers".