Fairy Tail: Living Nightmare

Summary
Fairy Tail: Living Nightmare is the second story of the Fairy Tail: Dawn of the Demons series that comes after the first story, Fairy Tail: Demon Castle, which is based on the Sacred Sentinels guild on their quest to find more answers to stopping the GULE-EEL project. The need to find the next key needed to activate the GULE-EEL. The Nightmare Wing guild is then defeated but the battle isn't over because the GULE-EEL project is then passed down to the next faction.