Eunsae is an ordinary student who happens to meet her alternate self in her dream one day. Eun-i and Sae-i are both Eunsae, just from parallel universes! After a year of regularly meeting up in their dreams, Eun-i makes a tempting offer: to switch places and jump into each other's universes for a week. Sae-i, having been envious of Eun-i's perfect...