Gedou Gakuen -nightmare Campus- 1-5 -a-d- -with... __full__ -

That’s the wildcard. In vintage file names, “-with-” often precedes the name of a specific fansub group (e.g., “-with-AnimeClassic-”) or a special feature like “-with-extras-” (interviews, art galleries, or the original manga preview). If you have a file named “Gedou Gakuen -Nightmare Campus- 1-5 -A-D- -with-fansub commentary,” you are holding a rare digital artifact.

Based on the subject line provided, this refers to the adult anime OVA series (often simply titled Nightmare Campus in English releases). The "1-5" indicates the episodes included, and "A-D" likely refers to the video source (an A-DVD rip) or a specific encoding group. Gedou gakuen -Nightmare Campus- 1-5 -A-D- -with...