Nightmare Cage: Boy vs Demon

A dark monochrome comic-style horror illustration against a pure black background, composed in a vertical poster. At the bottom center of the painting is a lonely short-haired boy sitting on the ground, knees curled up and crossed over his chest, head slightly bowed, conveying fear, isolation, and helplessness. Above him, the head of a gigantic biomechanical demon or armored monster was swooping down, featuring a long, angular skull-like face, a sharp jaw, narrow hollow eye sockets, layered helmet-like plates, and a serrated wide-open mouth. Around the boy were two huge bony claws, one on each side, encircling him like a cage; Each hand has long, segmented metal fingers, with sharp fingertips bent inward and exuding a very threatening aura. The overall design features bold white scratch lines and heavy crossing lines, creating a strong contrast against a deep black background, exuding the tension of Seinen manga. Bright neon-purple liquid splashes and long drip marks are added to the monster's face, claws, and ground, gathering around the boy to become the only strong color accent in the composition. Add vertical Japanese text "逃げちゃだメだ" in the upper right corner, and below it add small white English text: EGO BORDER: ACTIVE. The overall atmosphere is oppressive, psychological, claustrophobic, and filled with a nightmare-like feeling, like a dark anime poster about inner fear and mental breakdown.