Kotoko receives a request for help from a giant snake, who is the guardian spirit of Tsukuna Swamp. It appears that a murderer named Tanio Aoi disposed of a body in the snake’s swamp, but there’s something that’s just not sitting right with the snake. After learning about Kuro’s powers, Kotoko asks Kuro to accompany her on this journey, but Kuro declines for a certain reason...
This is why the third reason exists.
.لهذا هناك السبب الثالث
Und das erklärt der dritte Grund.
Por eso existe la tercera razón.
Por eso existe la tercera razón.
J’ai dit qu’il y avait trois raisons.
Ed è qui che arriviamo 
al terzo motivo, Grande Serpente.
Por isso existe o terceiro motivo.
Вот потому, Хозяйка,
и есть третья причина.