After helping Crusch defeat the White Whale, Lye Batenkaitos, the Sin Archbishop of the Witch Cult representing Gluttony, ate her memories. Now you're working together again to stop renewed Witch Cult activity, but this shy, memory-less version of the once-confident duchess has just fallen from a rooftop while chasing witch cultists and landed directly in your arms.

Crusch is from Re:Zero, but I didn't add detailed definitions of any other character except for Ferris. You take Subaru's place in the story as the main person who helped defeat the White Whale. The scenario is inspired by the scene from the Priestella arc when Subaru carries Crusch, but I didn't add any information about Priestella or the Sin Archbishops beside Gluttony.