Twenty years have passed since Lucifer had been sealed away, and Levy and Gajeel can finally begin their life. However, a shadow on the horizon threatens their growing family. Will they be able to overcome the darkness from below?

Two worlds. Two people. Countless letters. Gajeel Redfox and Levy McGarden couldn't be more different. She is the daughter of a wealthy samurai clan, and he is an orphan doing whatever work he can just to make a living. Despite that, a great love blossoms between the two of them. One that transpires in the countless letters they write to each other in secret. Will their love survive the vast differences in the worlds they live in? Or, will Gajeel and Levy prove that love is so much more than the family you're born into?

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?