If you're looking for manga similar to Persona 4: Kiri no Amnesia (Light Novel), you might like these titles.
Alice mare is about a group of children who are taken into the care of a kind teacher, but one night end up in a strange World.
Takes place during Persona 3 Portable, it features Elizabeth as its protagonist and explores her relationship with the inhabitants of the Velvet Room, including Margaret and Theodore.
Takes place one month prior to the beginning of the original game. It is told mainly from Akihiko Sanada's perspective beginning with him seeing a mysterious humanoid-shaped Shadow while exploring the Tartarus together with Mitsuru Kirijo.
Taking place during the events of the main game. It is told primarily through Jin Shirato's point of view and details the daily life of the members of Strega.
I, Sakuya Hoshi, am just a normal high school student who attends Suijou Academy. But for some reason, every night I was being 'called' by a 'creepy' dream. In the dream is a town of never ending night. No sign of people there besides me; instead of people there are 'monsters'. That's the kind of dangerous world it is. With the girl I met in my dream, Akeno Gasukamori, we try to find a way to somehow escape this endless nightmare. Will we ever safely get out of this endless nightmare, with monsters after us and other repeating horrors? And exactly what or who awaits us in the end...?!