Korea Seoul 1/31~2/1

I went to seoul from oita for the first time on 1/31. I had two troubles. one is I forgot a plug adapter for battery charging in just korea. 

another is I forgot getting korea money and my hotel is cash only, so I have to bring money. At first, I tried ATM for korean money, but there is a handling cost which is 3500 won apiece. finally I got korean money exchanging USD dollar  around myonhen that is so far from hotel. 

Its too cold in seoul, so I could be out of the guesthouse at night.