The 12 animals of Zodiac are given powers to rule the time. However, the dog commits suicide, thus removing himself from his role. The rat and the cow attempt to find the 13th animal, the cat, to replace the dog.

However...

After combining several tribes, the Shan tribes established a large country called "Istania" assisted by the Mu tribe. after it was realized, the Mu tribe went somewhere without leaving a trace. however, when leaving. thy tribe left a promise of brotherhood delivered only to the king, if the king lit a fire in the sanctuary of thy tribe.

In the lawless Arang Technical High School, Kim-gu simply hopes to lead his life as a "good student"...

(Source: MU)

A village like fairytale. A meeting of a sixteen years old boy and a girl.