Kling 1.6 (pro)
Animate this indoor scene realistically. Keep the same colors, lighting, and atmosphere. Do not change the perspective or camera angle. The camera should move slightly forward to create depth. Outside the large windows, show heavy rainfall falling straight down with natural movement, without raindrops running down the glass. Optionally, add subtle lightning flashes in the distance to suggest a thunderstorm, but keep it balanced and realistic. Maintain the moody, cinematic tone of the scene.