所有分集

當高中女生涼香醒來時，她被留在了一間封閉的公寓裡。母親傳來的訊息告訴他，這間公寓裡有一種神秘生物，名叫「X」。

涼香聽說兒時好友修平也被留在公寓裡，打電話給她。當涼香等待修平加入時，母親告訴她「X（犀牛）」的生態是怎麼樣的…

X（犀牛）聽力良好，兩條腿行走。涼香對 X（彩）感到困惑，它與她在夢中看到的特徵不同，但她首先前往四樓，修平正在那裡等待與她會面。

X（犀牛）聽力良好，兩條腿行走。涼香對 X（彩）感到困惑，它與她在夢中看到的特徵不同，但她首先前往四樓，修平正在那裡等待與她會面。

於修平的敏捷思維，他成功地分散了X（彩飾）的注意力。然而X（Pai）的追擊並沒有停止，修平最後被X（Pai）抓獲。

Ryoka and Shuhei make use of X's blindness and reach the elevator safely. What awaits the two on the 31st floor, which should not exist?

Ryoka and Shuhei have made it to the 31st floor, which shouldn't exist in the apartment building, and have cleared level 2.

Ryoka discovers a candy house. There, she finds a witch who is a level 3 X. Ryoka is thrown into a loop again and heads off to confront the witch.

Ryoka and Shuhei fight the witch to save the captured Hansel and Gretel. The witch uses spider webs to immobilize the four of them.

After defeating the witch, Ryoka and Shuhei take the elevator to the 32nd floor.

Without any clues from the notebook, Ryoka and Shuhei challenge Level 4. Ryoka is driven to despair by the fear of being killed again.

Having grasped the true identity of X, Ryoka and Shuhei make a desperate attempt to conquer Level 4.