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...
and the reading taken by a thermometer...
...وكان المحرار يشير حينها
Das Temperaturmessgerät zeigte 39 Grad
me tomaron la temperatura
con un termómetro, lo que dio 39 grados.
El termómetro calculó
que estaba a 39 grados
Quand on a contrôlé
ma température,
Il termometro, quella volta, 
indicava che la temperatura corporea