Hyperspace-where there is an infinite number of universes and dimensions. Where new universes are borned, where new possibilities are embraced. Yuri,Yoona,Taeyeon and Sunny were inhabitants of a hill at the edge of a countryside, named Yoochira.(derived from Yoochiri). The four of them lived in the same neighborhood and grew up together. Wanting to pursue their dreams together, they entered the same high school in Seoul, which was prestigious for its academic achievements.

When SNSD and SHINee were high schoolers.