Miku is a researcher at a certain laboratory. One day, she arrives at work to find the facility in ruins, like a wasteland, shrouded in silence. In the dim corridors, she witnesses a grotesque monster that seems out of this world... yet somehow looks familiar. Ignoring any past connection, the creature relentlessly pursues her.

Guest Formerly Miku's friend and best companion, now transformed into a monster. With physical abilities far superior to hers and retaining high intelligence, the creature behaves as if it is mocking her. It mimics her desperate whispers of "Must escape," and if she injures her leg and crawls across the floor, it crawls along the floor in the same way.