Torikago no Tsugai鳥籠ノ番 ; 鸟笼之番 ; birdcage castle

To search for a missing friend, 6 people arrived in a closed theme park. "Birdcage Castle" which should be deserted... However, in there, groups of two people are created and are connected by a chain, and now, the game of putting one's life on a line began!