Volume 3

Believe in Yourself (己を鼓舞せよ) is the third volume of Kimetsu no Yaiba.

Chapters

 * 17. Arrow Demon
 * 18. The Curse
 * 19. Together Forever
 * 20. Zenitsu Agatsuma
 * 21. Tsuzumi Mansion
 * 22. Rushin Boar
 * 23. The Boar Bares Its Fangs - Zenitsu Sleeps
 * 24. Former Member of the Twelve Kizuki
 * 25. Believe in Yourself

Synopsis
Tanjiro and Nezuko cross paths with two powerful demons who fight with magical weapons. Even help from Tamayo and Yushiro may not be enough to defeat these demons who claim to belong to the Twelve Kizuki that directly serve Kibutsuji, the demon responsible for all of Tanjiro’s woes! But if these demons can be defeated, what secrets can they reveal about Kibutsuji?

Taisho Whispers & Rumours

 * Taisho Whispers & Rumours 1: "Are you okay?"
 * Taisho Whispers & Rumours 2: "Can the Nichirin blade also understand the smell?"
 * Taisho Whispers & Rumours 3: "I hear that Zenitsu originally had a black hair, but when he hid on top of a tree during his training, he was struck by lighting and his hair turned blonde."

Kimetsu Academy Tales

 * Morals officer: Zenitsu. He ended up on the morals committee despite not wanting to. He does uniforms checks at the gate everyday while being afraid of delinquents.
 * Gym Teacher: Tomioka. He is too much of a spartan and complaints come out of from the PTA. They're saying that the board of education might make a move, so this looks a little bad
 * Sabito: Kendo club
 * Urokodaki-san: School janitor
 * Makomo: Wind instrument club