Responses
They might be Bexan's pack since they both have blue eyes and white hair
True, but judging by the order of the scenes (wolves appeared right after a conversation between Diesel and Ein) I thought wolves may have something to do with Diesel and Ein. I even thought at that time the pack may have been a part of the conflict in season two.
As for Bexan, I think they might be his blood-related pack in Siberia, because the landscape doesn't look like South Korean to me.
So... I was reading the whole story again and in the last chapter of the first season, Ein and Diesel were talking how they cannot go anywhere Europe and the last scenes show wolves and some person with long white hair and blue eyes... Can it be Diesel's original pack?
http://www.mangago.zone/read-manga/wolf_in_the_house/nmt/c031/22/