character: cirno, anime illustration, Cirno, a small chibi fairy girl with short blue hair, a large blue bow, blue eyes and translucent ice wings, sits on a classroom chair wearing a white shirt with puffy short sleeves and blue bow under a blue dress, focused on writing math solutions with her pencil on a quiz paper at a school desk, animated numbers and equations swirling around her head. Behind her, Eirin stands slightly to the side, watching with a calm expression, hands crossed. Simple school classroom with various desks, windows, and charts around the pair in the background. High quality digital anime illustration, sharp highlights, vivid color palette, bright ambient lighting, and lively, playful atmosphere.
