Episode 5 of the fourth season of "Demon Slayer" begins with Tanjiro's arrival at Kanroji's place, where she treats him to delicious pancakes. Afterwards, he participates in her intense flexibility training, which humorously includes a 180-degree leg split. Tanjiro is then sent to the Serpent Hashira, Iguro.

Iguro immediately shows his dislike for Tanjiro, which is further fueled by Kanroji's letter about her experiences with him. During Iguro's training, Tanjiro must cut a rope between wooden planks in a room where trainees are tied up as punishment. The scene is filled with the fearful thoughts of the trainees, who hope not to get hit. After days covered in bruises and painful hot baths, Tanjiro finally manages to complete the training. Iguro dismisses him with a sharp remark about his relationship with Kanroji.

Tanjiro then heads to the Wind Hashira, Shinazugawa, where he encounters a terrified Zenitsu fleeing from Shinazugawa. After Zenitsu is knocked down, Shinazugawa begins his brutal training with Tanjiro, who openly admits he dislikes him for attacking Nezuko. Over the following days, Tanjiro endures harsh blows and colorful bruises. He overhears a tense conversation between Genya and Shinazugawa, revealing a hidden past and provoking Shinazugawa to attack Genya. Tanjiro saves Genya with his quick intervention.

This confrontation leads to Tanjiro being expelled from training with Shinazugawa. Tanjiro and Zenitsu then make their way to the residence of the Stone Hashira, Himejima, deep in the forest. There, they discover several students, including Inosuke, submerged in water, and Himejima training amidst fire while carrying logs on his shoulders.