In the cartoon, there is a man who works in a hotel. He has a card that can call women by other people's names.

Not too distant future. Suddenly, a "black spot" leading to another world appeared all over the world. Alien monsters commonly known as Z/X appear from it. As a result, Z/X launched a fierce battle with human beings. A few years later, the war subsided and the earth ushered in a brief peace. The hero, Amano's flying bird, lives an ordinary high school life in Kobe, Japan. However, once he took the "card device" from an incredible girl he met on the street corner, his fate began to change dramatically.