A richly detailed anime-style illustration of a late-night Call of Cthulhu tabletop RPG session in a dim antique study lit by warm oil lamps and candles. Three young women sit around a wooden table crowded with game materials. On the left, a girl in a military-style cap and camouflage jacket with long dark braided hair writes notes on a character sheet with a pen, looking stressed and slightly overwhelmed. In the center, a girl with very long pale lavender hair in twin buns and flowing lengths wears an elegant dark green dress with gold trim and white lace cuffs, smiling mischievously while holding up a large hardcover book titled "Talk of Cthulhu" with a dramatic occult monster cover; above her is handwritten Japanese text reading "これで全員 一時的狂気ね" with a small heart. On the right, an orange-haired girl in a white lab coat with a stethoscope and ID badge reads a paper nervously, with handwritten Japanese text above her that says "SAN値が ピンチ!" with energetic accent lines. The tabletop is packed with exactly 10 polyhedral dice scattered across the center, assorted papers, 3 visible character sheets or note pages, 4 large map sheets, 2 mugs with dark emblems, 1 glass of iced cola, 1 plate of cookies, 1 bag of potato chips labeled in Japanese, 1 small standing sign reading "発狂中", 1 black ink bottle, 1 white feather quill, 2 closed occult hardcovers stacked at the lower right, and 1 large open illustrated monster book on the right. The room behind them has tall bookshelves full of old books, framed occult artwork including a tentacled creature image, a large aged wall map with pinned markings and strings, candles, wood furniture, and a moody Victorian occult-library atmosphere. Composition is a wide cinematic group shot from slightly above table height, highly rendered, warm brown and amber lighting, intricate textures, expressive anime faces and hair, playful horror-comedy tone, premium light novel or visual novel key art quality.