Demon Slayer: Kimetsu no Yaiba

Season 1, Episode 21

Episode Title: Against Corps Rules

Air Date: 2019-08-24

Overview:

Seeing Tanjiro try to protect Nezuko even as he collapses triggers memories of Rui’s own past. Once a sickly boy, he became a demon after meeting Muzan Kibutsuji who gave him a share of his blood. But after he turns into a demon, his own parents try to kill him. Ever since then, he has been searching for a family. Seeking a bond that he can never hope to acquire...