Anime Berlin #8: Lonely Castle in the Mirror [Kagami no kojô] [OmeU] JP, 2022, R: Keiichi Hara mit Ami Tôma, Mana Ashida, Yûki Kaji, 116 Min
Seven teens discover their bedroom mirrors are portals, and they're pulled from their lonely lives to a wondrous castle filled with winding stairways and watchful portraits. A girl in a wolf mask invites them to play a game.
Trailer: