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 how do you know
your temperature was over 102 degrees?
وكيف عرفتَ أنّ درجة حرارتك تجاوزت 39؟
Potrei sapere come fai a essere certo 
della tua temperatura?
E como você sabe que sua 
temperatura estava 39 graus?
Можешь объяснить,
как ты определил температуру тела?