Nagi, who lives in a faraway village close to the sea, is bored out of her mind and drifts in her last summer holiday before ending high school. One fateful day, she has an out-of-body experience (!) and meets Pratess, a chill cosmic being (!!) from another plane of existence (!!!). Can our mundane reality be exciting from another point of view? It's the beginning of the end for Nagi's and her friends' childhoods, and a fantastic end it shall be.