Kimetsu Gakuen! Volume 4

 is the fourth volume of the Kimetsu Gakuen! spin-off series by Natsuki Hokami.

Chapters

 * 16. Crispy Salmon Mayo Cheese Bread (こんがり鮭マヨチーズパン)
 * 17. Ubuyashiki Estate's Secret (産屋敷邸の秘密)
 * 18. Pajamas Panicking Party (パジャマ・パニック・パーティ)
 * 19. Civic Teacher's Nyanzu Challenge (公民教師のニャンズーチャレンジ)
 * 20. Get the Kimetsu Document! (キメツ文書をゲットせよ!)