Mainly about not forget when accident death said of boys and girls high school students Murakami Ryota, and she has proven that aliens do exist agreement, in order to achieve such an agreement, he in the Astronomy Club use Observatory telescope looked up at the night sky to try to find out the star people every day. One day, in a good too faces and his childhood sweetheart black cat is very similar to the transfer student Kuroha Neko, she escaped the research facility magic, the story also officially launched.