User blog comment:Hitsuji Mamoru/Servant Creation Room 2 : Guess of the Who/@comment-27971189-20170323061042/@comment-4802891-20170325203655

That's the one I had in mind too.

I don't know what a low-ranked Pursuit of the Unknown means, but maybe it is about searching for gossips and untold stories rather than... eh... untold History/universal truth?...