I'm not sure specifically what 'tg ar story' is without more context. It could be a story related to some kind of technology (TG might stand for something like Telegram or Transformational Grammar) and augmented reality (AR).
Well, an intro such as 'AR wreck stories are not just tales of technological glitches in augmented reality; they are a window into a new realm of chaos and unexpected outcomes. Picture this: you're walking down the street, your AR glasses on, and suddenly everything goes haywire.' This gives a vivid description in the intro which can draw the audience in.
Most of the time, no. Mangas are categorized differently, like for kids, teens, or adults. An AR level isn't a common way to classify them. It's more about themes, violence, and such factors.
Definitely not a true story. FNAF is a work of fiction that takes place in a fictional world with its own set of rules and scenarios. It's all about creating a thrilling and immersive gaming and storytelling experience, not reflecting reality.