Death Chamber Audition

Saki Tsujimura auditions for an actor position. She is chosen for the finals, but ends up stuck in an underground basement with the other final contestants, including Kanata Shimizu. With the sharp looking Kuwashima, cold-blooded Akari, and nice Yuuto, the final audition begins. Learning that it is a death audition, Saki and the others try to escape. Will they succeed? What is the purpose of this?