An Angel and a demon. The two couldn't be more opposites. Yet, they seem drawn to one another, unable to stay away. When the angel Gajeel and the demon Levy meet, they are determined to stay enemies. As is the nature of demons and angels. But, something keeps luring them back to each other, and neither one is able to stop it. Eventually, the two break the ultimate rule of both of their worlds: do not fall in love. Unable to stay away from each other, the two fall into a doomed romance. One which is more passionate than either of them ever intended--or that they care to control. When their secret gets out, along with an ancient evil that they can't face alone, will the two be able to stay together? Or will fate tear them apart?

Told from the perspectives of Gajeel and Levy, Lucy writes this: her greatest novel. In celebration of her dearest friend, she details the life of Levy McGarden, leading up to that fateful day. Levy McGarden, a brilliant bookworm and a talented solid script wizard, discovers a dark secret one day on a job. Throughout her investigations into the truth behind this secret, she grows close to her fellow guild mate, Gajeel Redfox. Introduced to the guild as a hardhearted Iron Dragon Slayer, Gajeel is slowly transformed into a caring man—one who would do anything for the small solid script wizard he had become so fond of. As the two grow closer, they begin to realize that they mean more to each other than that of a normal friend or teammate. They maybe even love each other. However, fate has a funny way of intervening at the worst of times.