For as long as she could remember, Tzuyu had always worn the same pair of glasses despite her pefect eye vision ever since she was just an infant. While she never understood the real reason behind it, Tzuyu respected her mother's decision and never poked into the matter until she loses her glasses at a school camp.

Then he started to appear. A strange, silver haired boy who appeared everywhere she looked. Never speaking, never moving, just observing her from a distance. And no one else apart from Tzuyu can see him.