After Beatrice's downfall, Lambdadelta assumes the role of Game Master, with Bernkastel leading the human side. Battler delves into uncovering the secrets of Beato's games and clashes with Erika Furudo, a detective molded by Bern, whose 'mystery' approach conflicts with Battler's 'anti-fantasy' beliefs. The narrative spotlights Natsuhi as she grapples with ominous calls from a mysterious figure known as the 'Man from 19 Years Ago'.