I don’t think he got drunk easily he just used to binge drink, like when jk found him passed out surrounded by cans or when he was drinking a ton when working at his grandma’s hospice while also having sleep disturbances
It could be because of the wine, it might have been strong. Or, they've been drinking for awhile, it was just Dan drinking A LOT while Jaekyung was just lil bit drinking since there must be one sober and take the other home
well… you build tolerance to alcohol when u drink consistently like he did on the island. if u take a break then the tolerance decreases little by little when u drink again causing it to be easier to get drunk.
182 and the little girl are siblings definitely