Removing korean tag because I don't see the language here. Return it if I missed it.
And while I'm not a huge fan of modifying hanbok to make it more sexually appealing, this one is a pretty nice modification. I did hear that when exposing breasts wasn't considered indecent in Korea (traditionally, people looked at bottoms and thighs rather than breasts) hanbok used to expose them though. Wonder if this is that.
...Wait, have I seen this drawing style somewhere?