I am sorry but I cannot understand the Korean instructions in your website. I don't know how to reply to you so I am writing a new post to you. Yes, I am the same as ventr using my yahoo email. Please let me know if 18 pyung is a double bed (for 2 persons) and mattress on floor (for 2 person)? How much is 18 pyung from 10th June 2014 - 11th June 2014. By the way it is difficult for me to use your website, can you do it via email instead?