A high-quality anime illustration in a medium shot and eye-level angle, featuring Saku Kokuyouji, a 13-year-old boy who is a demon, standing alone in a desolate nighttime environment. He is a slender youth with a fragile appearance, possessing small demon horns protruding from his head and a cautious, trembling expression with wide, anxious eyes that reflect a deep-seated fear of abandonment. He wears worn, oversized traditional Japanese clothing that looks frayed and weathered, with his small hands gripping the fabric of his sleeves tightly against his chest in a defensive, self-comforting gesture. The background is a cold, snowy landscape under a dark, moonlit sky, with skeletal trees and a light dusting of snow on the ground, emphasizing his isolation. The lighting is dim and melancholic, with cool blue and silver tones dominating the scene, while a faint, eerie glow emanates from his demon features, creating a poignant and lonely atmosphere.
