Panŭl kwa kajuk ŭi si

In a ruined world, the last remaining people are on the verge of extinction. Nineteen-year-old girls, Shiha and Kanta, lost their parents when they were young and now live in Henry Zoo where a dragon lives. When humans want something, they can ask the dragon for a deal. The trading tool is poems and songs of the past, which only Siha has the ability to perform the mission.