The Hashira, Sanemi and Iguro, along with their comrades head to an abandoned castle on top of a mountain for a mission, while Tanjiro is being treated at the Butterfly Mansion for the wounds he suffered at the Swordsmith Village. Later on, the Hashira gather at the Ubuyashiki Mansion to hold a Hashira meeting, where Muichiro reveals how the marks manifested. In an effort to strengthen the entire Demon Slayer Corps from the bottom up, the Hashira Training begins...
The group strength training program
is about to start!
!يوشك برنامج تدريب القوّة الجماعيّ أن يبدأ
¡Va a comenzar un entrenamiento
para fortalecernos a todos!
C’est l’heure
de l’entraînement intensif commun !
Si terranno allenamenti congiunti 
per potenziarci!
O treinamento de fortalecimento 
em grupo vai começar!
Нас ждут групповые
укрепляющие тренировки!