Natsuki Subaru, an ordinary high school  student, is on his way home from the convenience store when he finds  himself transported to another world. As he's lost and confused in a new  world where he doesn't even know left from right, the only person to  reach out to him was a beautiful girl with silver hair. Determined to  repay her somehow for saving him from his own despair, Subaru agrees to  help the girl find something she's looking for.