The spookiness of glass reflection ghost stories lies in the unexpectedness. We often use glass for normal, everyday things like looking at our reflection. So when a ghostly figure suddenly appears in that same reflection, it's a shock. It's like our normal world is invaded by the supernatural.
There is a story about an old, abandoned house. A girl once passed by it and saw in the glass reflection of a broken window a figure that seemed to be floating. It was a ghostly woman in white. The girl ran away in fear and later heard from the locals that a woman had died in that house many years ago and her spirit was said to be trapped there, often seen in glass reflections.
Oh, for sure! Death Note is considered a masterpiece in the manga world. Its unique concept and the way it unfolds make it a must-read. The characters' development and the moral dilemmas presented make it stand out from the crowd.