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masterpiece, best quality, 1boy, cool, ikeboy, ikemen, tsujummi, kawaii art, cute anime, refined linework, smooth curved linework, smooth gradients, (Muted pastel palette:0.7), (thick lines:0.7), man, mermaid, beauty, handsome, beautiful, aquarium, inside aquarium, blue hair, yellow eyes, long hair, straight hair, underwater, beautiful expression, trapped in aquarium, with mermaid tail
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