Naturally since humor is relative to your culture, a few of those comics aren't as funny if you aren't Korean. Like, the character Dooly in one comic is a parody of an incredibly popular kids-show character in Korea. In another comic where the guy's parents ditched him until he got a job, that's coincidentally closely related to some strife in my family right now, and it's because my mom is Korean.
Only a few of these are culturally relative though, most make just as much (or as little sometimes) sense no matter where you're from. Half these comics are about the characters acting like everything's normal and then in the last panel they realize "wait wtf"