Kankin Kuiki Level X  

Lockdown Zone: Level X, 監禁区域レベルX, Lockdown Zone: Lv. X

Ryoka receives numerous texts from her mom, causing her to panic. Despite her concern for Ryoka's safety, Mom does not want to reveal the reason behind it. She believes that nothing can accurately describe what is happening, such as the possibility of the world ending or a new life form appearing on their apartment building's roof.

The anime is adapting the Romy Ooishi's interactive web novel published on peep and not the manga series serialized on Web Action.