A medium shot from a side-angle view captures a 13-year-old girl submerged deep underwater, drifting slowly through the void. The girl has short black hair that floats weightlessly in the water and is dressed in a thick, white knitted sweater that billows around her. Her expression is one of distress and struggle, with wide, panicked eyes and her mouth slightly open as she gasps for air, her hands clawing weakly at the water surrounding her. The environment is a deep, oppressive aquatic space with dark blue gradients and shimmering caustic light patterns refracting from the surface far above. Tiny, crystalline air bubbles escape her lips and float upward, creating a sense of suffocating tension. The visual style is a high-quality anime illustration with a cool color palette, soft depth of field, and a haunting, melancholic atmosphere characterized by the contrast between the bright white sweater and the dark, drowning depths.