Grisaia no Meikyuu: Caprice no Mayu 0

Roughly a year after his arrival at Mihama Academy, Yuuji makes the unexpected decision to pursue promotion within the institution he works for.

He meets with JB at "corporate HQ" to discussing the documents he submitted for review as a part of the promotion process, documents pertaining to none other than his own past.

Meanwhile, back at the dorm, the girls find themselves unwittingly following along after Sachi and Makina restore the shredded rough draft of said documents.