Crisis Core: Final Fantasy VII/09: Escape the Nightmare

This chapter starts in the Shinra Manor. The walkthrough assumes that you did everything (so if you don't receive a mail when it's mentioned in the walkthrough for example, it's surely because you missed something).

Basement Facility
After the custcene, interact with the scientist on the floor to obtain a Dresser Key. You'll also receive new missions. There is a note on the "bed", read it. Before leaving, go to the library, there is a chest containing 10,000 Gils. There is also on the desk Researcher's Diary 1. When you're about to leave, you'll receive a mail from the Reporter.

Underground Cave
You'll receive another mail. Then go towards the ladder. When you're about to leave you'll receive a mail from the Keepers of Honor.

Inside the Manor
You'll receive a mail from the Study Group. Then, as you progress, four other mails