Hissori and Gami were just two, normal teenage sisters who were born on the exact same date and time, just on different years. Who share the exact same birthmark just on different parts of their body. Nothing suspicious about that, right? Well, when the girls' mother suddenly dies on their birthday, they begin finding others with the same birthmark. And when they finally uncover the secret, they find out they're very special, and were created for a very important reason.
Elliot Jensen and Elliot Fintry have a lot in common. They share the same name, the same house, the same school, oh and they hate each other but, as they will quickly learn, there is a fine line between love and hate.