Prompt: Craft a captivating and emotionally charged painting depicting Levi Ackerman and Alvin Smith in a real-person-meets-fine-fiction style. Showcase them sharing a tender kiss amidst a dramatic scene of colossal titans and ancient castles during sunset. Both characters should be depicted with strong, well-defined bodies, wearing Survey Corps uniforms, symbolizing their unwavering commitment to each other even in the face of apocalyptic challenges. Capture the essence of their enduring bond, as if they've fought side by side to the very end of the world