The setting is a science classroom on a spring afternoon. The composition is from the front-left (a slightly diagonal side view), depicting two female students observing a bird's feather on a desk. Both are wearing blue jumper skirts, long-sleeved white blouses, and red ribbons. One has a loosely braided side braid, and the other has soft, shoulder-length inward-curled hair. They are quietly smiling while gazing into a fish tank, their expressions showing calm concentration and gentle interest. On the desk is a fish tank containing medaka fish and green aquatic plants. The entire science room is brightly lit by overhead fluorescent lights and natural light (6500K) from the window. The soft spring sunlight creates delicate highlights on their hair and the shoulders of their uniforms, with faint reflections of the water surface on the glass of the tank. The overall style is Kyoto Animation-style, emphasizing light transmission, soft shading, a clean and warm tone, and calm, delicate facial expressions. Theme: "Concentration on science," "Spring light," "Quiet passion and gentle smiles." Soft_Clear_Style, soft lighting, translucent skin, clear color palette, smooth shading, gentle light diffusion, subtle glow, airy atmosphere, high brightness, delicate gradients.