Just last week I was browsing a 7/11 and came across a canned beer I hadn't seen before: WA Bar Dunkel. It's a German dark wheat beer, that is interestingly brewed in Germany and imported to Korea, then sold under the WA Bar brand name (ostensibly for import tax savings).
My sources have told me that a) it's actually Oettinger Dunkles Hefeweissbier and b) the aforementioned beer is actually among the cheapest you can buy in Germany. But don't let that turn you off, because I'd add that c) this beer is ten times better than any of the shite American largers, or even shitter Korean clones cut with rice, that you can normally get in a convenience store in Korea.
It sells for 3,500 won for a 500mL can at 7/11, so do yourself a favour and go grab one.