Hi, the Anime (Episode 1) start with the Exlosion of the Classroom.
There is Material before the Start of Episode 1.
2 Characters fight each other, decide to work together to attack Administrator D and Fail with Transcription.
Its not realy long and i am not secure if it was some Advertisment Trailer or some Additional Material at the End of another anime (Sounds silly i know).
However YES i am secure i bet my life on it.
This Episode 0.5 dont contains Kumo and is not immediately recognizable as Material for the Anime.
I have try my best to find it agan but now all is full with search Junk making me stuck on search.