An Encore and Continuance: Pandora's Box - A strange phenomenon is overtaking the world?! -

This episode serves as a transition between seasons 1 and 2 of Monster Strike. Ren and his companions are relishing their hard-earned peace after triumphing over the War Gods. Their lives are disrupted by the sudden appearance of Pandora, a mysterious girl carrying a box of unknown origin. The box is explicitly stated to be something that should never be opened. Despite this, an unfortunate incident occurs, leading to the box's inevitable opening. This event triggers a strange phenomenon that begins to overtake the world, hinting at significant changes and challenges to come. The episode focuses on the shift from a period of relative calm to the onset of a global crisis.