[Cos group wear + movie viewing body + Detective Conan + fandom]
What happens when a big family that happens to be cosplaying travels through time?
Does the system also have a purpose?
Let's step into the world of science to find out!
I have written about other worlds, and the specific settings have been published.
This is purely for entertainment, I can't guarantee it won't be OOC, the cover will be changed later.
Purpose: Make yourself happy