The story of a young dragon girl being lazy, doing her best...and being lazy again. Ruri faces the usual issues: pushy classmates, annoying teachers, and...waking up with dragon horns?!

A mysterious mastermind single-handedly releases 206 of the most dangerous prisoners around the states. When the prisoners rampage New York City, the police helplessly watch as a young boy with a katana appears. His mechanical arm has a countdown from 206; what is his purpose?

Kagami Koori is haunted by demons made of ice, but she is protected by a man who calls himself a "Joreishi", although his flame ability is powerful enough to fight off the demons, he is a bit overprotective.

The story follows Shirou, a wingless boy who lives in the world of the angels, however that won't stop him from aiming to be an archangel which are warriors who purify the villainous demons.