The game is loosely based on the real-world in 15th-century England. Familiar characters from the anime take on historical identities:

is a tactical card-battling game released for the PlayStation 2 . It is a departure from traditional Yu-Gi-Oh! rules, blending deck-building with chess-like movement on a 7x7 grid. Historical Setting & Story

represents the House of York (White Rose) as Christian Rosenkreuz.