"Darkness and light need each other just like yin and yang- without the other, the one could not exist." Having saved their realm, Akari, Sora, and the others have been enjoying their several months of peace since the beginning of a new era. However, their peace gets disrupted by a call for help from Azuma, who asks them to help her save the Nightmare Realm. While on their journey across a realm that's new to them, Akari, Sora, and company come across many discoveries of their own, and Layla finally gets answers to the clues she's been looking for about her upbringing and her background. Life as an Aria isn't easy, fighting in an unknown world is even harder, but dealing with inner demons is probably the hardest of them all. After all, the dark is when our demons come out the most.

"With bloodied wings do those who want to make things right carry themselves and yet others instead only see the wrongs they believe them to be." In a world where creatures from nightmares roam, sixteen year old Akari Hana fights in order to keep humans like herself safe. Many years ago, a cataclysm occurred where the seven deadly sins and the seven heavenly virtues were born into human forms. Upon this, creatures of nightmares were also born out of the cataclysm. The seven sins and virtues then fought in order to keep the balance in the world. Over time, the world seemed to reach more of a balance. Now, the sins and virtues practice their crafts in an academy deep in a mystical jungle below the regular realm of the human world. This is where the prodigious Akari Hana has trained her entire life to fight alongside the sins and virtues to keep her world safe from the creatures that keep coming back. However, recently more creatures have been spawning and Akari has been tasked with finding out why. While being tasked with this quest, Akari stumbles upon a rather pressing dilemma. Shall she execute a rather dangerous and peculiar creature she comes across or will she enlist his help in saving the world? After all, humans can be monsters too.