It expresses the complex psychology of a lonely mountain demon sitting on the edge of the cliff looking at the brightly lit human world opposite, yearning for the fireworks in the human world, but afraid of being hurt by the feelings of the human world. According to Kugou Music query, "Mountain Monster" is a song written and composed by Little Star Aurora, and sung by Zhou Yue and Little Star Aurora. The song was released on June 6, 2019. The character prototype described in the song is from "Swagger" The heroine.