The Kairou (廻陋, Kairō?, lit. Looping Tunnel) is a pitch-black, tube-shaped mushi that exudes a flowery scent to lure in insects and other small creatures, trapping them in a strange time loop and causing its victims to repeat the same life over and over again.
Symptoms[]
Once a victim of the Kairou has lived through their life at least once, they will get the feeling of déjà vu as they repeat their life over and over again. The scent of flowers will also make them anxious and feel as if they've forgotten something important.
However, determining whether someone is being affected by the Kairou is difficult, as the only observable symptom is the victim feeling a sense of déjà vu and it is impossible to investigate something as prolonged as the victim's lifetime.
Weakness[]
The Kairou has no known weakness, but if a victim becomes aware that they are caught in its time loop, they can choose not to enter the Kairou again, thus breaking the cycle.