To aru majutsu no index author Kamachi 10th anniversary PV showing characters from various series written by the author. Including index, heavy object, a simple series, intelectual village and Waltraute's marriage. Not to mention kamachi's upcoming new novel Mitou Shoukan: //Blood Sign, releasing september 10. I have no idea what this PV is for, but there's an event on october 5th where they'll make a supposingly big announcement.
https://youtu.be/Y8ZCp7FnD3w