As Shoko races to save Athena, she comes up against an old foe: Ruin Atë! Luckily, Shoko isn't alone: fighting alongside her is Mayura, the woman who taught Shoko how to fight. Mayrua has a plan for defeating Atë, but it's one that comes with a high cost. Is Shoko willing to risk the life of her comrade to defeat the enemy?