Mystery Merchant's Lottery

The Mystery Merchant's lottery doesn't appear every time, but sometimes it pops up, and you get an item if you watch an ad. If you give up the expectation of getting good items, it's sometimes worth watching. When you win: The character '무' (Mu, possibly from '무용' - dance) dances. The character '두' (Du - head) seems to be drinking and holding a feast.