Yewon was the princess of a country that was being devastated by war. In order to end that war, her father, the King, married her off to the enemy prince.  She had to make a home in the palace of the enemy, married to a prince with a heart of ice. (video by 

Wonwoo works at Shining Diamond Cafe, and Mingyu lives in a flat two stories above it. All Mingyu had to do was buy a latte to get the cafe's wifi password, and he's been using it in his apartment ever since. Meanwhile, Wonwoo's boss demanded that he catch the thief who's been stealing their wifi.  ... A tale about the most important things in life: coffee, love and wifi.  

What happens to Mingyu and Wonwoo after the end of That Stupid List?  Yes you have to have read That Stupid List for this to make any sense!!!