(Atsushi book theory) (Updated!) (atsushi is related to the book)

it was a normal day in the armed detective agency building, mostly everyone was doing work, dazai was being lazy like always and yosano was talking to ranpo, nothing unusual..

atsushi was finish with a report so he got up and went to give it to kunikida, when atsushi felt pain throughout his whole body, which was obviously unusual

atsushi can feel the book, a page was being ripped out, atsushi felt pain when the page being rip out of the book itself.

Dazai: "hm? Atsushi, why are you just standing there?"

everyone's attention went towards atsushi, ranpo just seem to realize something was about to happen and yosano noticed ranpo look and immediately knew something was happening because ranpo faces was serious.