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...
I mean, you'd be sad without me, right?
ستشعرن بالحزن بدوني، صحيح؟
Ihr habt mich voll vermisst, stimmt’s?
Me echaríais de menos, ¿verdad?
Vous seriez si tristes sans moi !
Sareste tanto tristi senza di me, vero?
Quer dizer, vocês ficariam 
tristes sem mim, não é?
ว่าแล้วไม่มีผมสักคนต้องเหงาแน่เลยเนอะ?