is demon slayer: kimetsu no yaiba episode 13 filler?

Tanjiro struggles to fight against Kyogai, the master of the mansion, as the room spins every time the demon plays his tsuzumi drums. Debilitated by the broken bones he sustained in his previous battle, Tanjiro must reassure himself as he desperately fights on against Kyogai’s overwhelming Blood Demon Art.

Will he find a way to slice off Kyogai’s head?