If you are looking for "paper" related to this title, it usually refers to one of the following: Lore or Plot Details

: The game typically features a "senior" (senpai) perspective observing a "junior" (kouhai) who has been shrunk. Game Development Background

: If you were looking for a physical activity, there are many pen and paper games like "SOS" or "Dots and Boxes" that are popular for after-school boredom walkthrough guide , or perhaps a printable game inspired by this theme? 10 Pen And Paper Games | My Baba

: Often discussed on forums or creator blogs (like Patreon or Fanbox), though these are rarely archived as formal papers. Pen and Paper Alternatives

After School Shrinking Adventure " appears to be a Japanese indie horror or fetish-themed game, often referenced in niche online communities and video platforms like

. Because it is likely an indie project or a "fan game" found on specialized hosting sites (such as Itch.io, DLSite, or Pixiv), there isn't a single formal "white paper" or official documentation for it in the traditional sense.