what's everyones thoughts about him being registered as his son/dad... ??

Korean reality check

Not the biggest fan but I also get why they had to do it that way. Unfortunately it seems like Korea is still far behind in terms of acceptance for queer relationships so the only legal way to be family is adoption.
That being said.... doesn't he have US citizenship? Like... come on over, have a wedding and be legally married in the eyes of the USA.