Lockdown Zone: Lv. X

On a chilling Christmas Eve, high schooler Ryouka Tsurumi awakens to an unsettling reality. Her opulent mansion has been evacuated and placed under lockdown due to a menacing entity known as X. With her mother gone and only her childhood friend, Shuuhei Murosaka, left behind, Ryouka quickly discovers the terrifying nature of X, which possesses the ability to brainwash individuals to serve its grim hunger for human blood.

As Ryouka and Shuuhei struggle to navigate the horror surrounding them, they must evade both X and the hypnotized victims that now threaten their lives. Just when it seems they have found a way to escape, they fall victim to the creature’s gruesome appetite. However, the true nightmare has only just begun for Ryouka, as she finds herself reliving the same harrowing events in a relentless time loop. Determined to break free from this cycle of terror, she joins forces with Shuuhei once more, seeking a path to safety and a future untainted by the horrors of X.