A+B

Thirteen years ago, the angels invaded Earth. Since then, various organisations have cropped up in order to protect the world from them. Seika College boasts the best Angel Assassination Squad in Japan. Its students are all from prestigious family backgrounds, the cream of the country. What will happen when rough-mannered country bumpkin Kentarou Uesugi and his quiet, mysterious friend Shinobu Akehoshi are invited to enter?