A recap of Kimetsu no Yaiba episodes 15–21, with new footage and special end credits. Tanjiro, now a registered Demon Slayer, teams up with fellow slayers Zenitsu and Inosuke to investigate missing person cases on the mountain Natagumo. After the group is split up during a fight with possessed swordfighters, they slowly begin to realize the entire mountain is being controlled by a family of Demon spider creatures.

• Natsuki Hanae
• Akari Kito
• Hiro Shimono
• Yoshitsugu Matsuoka
• Koki Uchiyama
• Saori Hayami
• Takahiro Sakurai
• Reina Ueda