After entering the library hall (Puro's reading room), the Human is presented with a giant sentient tail, which starts to chase him. It pursues the protagonist slowly at first, but then starts to dash at them at a high speed when he's in its line of sight, somewhat similar to Ming Cat. It will also jam the door with it’s gooey recluse. Once it catches the Human, It will transfur the human into an asian fox spirit (most likely a huli jing, considering it’s resemblance to Shizi with red markings.