There is no officially confirmed standalone "Work 7" or 7th episode in the standard release schedule for the initial anime run, which primarily consists of 6 episodes The Movie Database Possible Context:
If you can provide the correct full title (in Japanese or English) or the author/game developer name, I’d be glad to give a more precise, helpful summary or link to articles. seika jogakuin kounin sao ojisan 7 work
In the seventh installment, the production typically ramps up the variety. Usually, these "works" are structured as multi-part anthologies within a single release. There is no officially confirmed standalone "Work 7"