Before the start of the TV anime
Yamada-kun to 7nin no Majo,
there was a 30 minute special featuring some of the seiyuu.
There was a short introduction of the story (anime),
and a message (text) by the author.
Then there were short video messages by Hayami Saori and Ohsaka Ryouta,
introducing their own characters.
There was a "majo kai" talk by Takao Yuki and Tazawa Masumi.
Both Yuki and Masumi were wearing witch hats, and this talk took place
in a school classroom. This talk was around 10 minutes.
At the end, they showed a little bit of episode 1.