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Anime style digital illustration, book cover art. Two beautiful women standing side by side in front of a looming dark gothic cathedral at night. Character on the left: wearing a modified nun habit, black and white, form-fitting, skirt with high side slit, black thigh-high stockings, black hair with purple tips, alluring expression. Character on the right: wearing a tight long-sleeved purple turtleneck, blue denim jeans, silver cross necklace, black hair with purple tips, confident smirk. Background: intricate gothic church architecture, stained glass windows glowing purple, crescent moon in the sky, dark atmospheric lighting, soft purple gloom, floating magical particles, fireflies., sharp focus.