Anime Crossover: After Becoming a Demon, I Never Give Up Looking for My Sister

Zhu Xiong, who tried to kill Muzan on his own, was taken out with a casual wave of the Demon King's hand, and ended up on a different path. The first to notice this was, unexpectedly, his brother's good teammate. Zenitsu: Nezuko has an older sister? Tanjiro: ?? My little brother turned into a demon by Muzan learned to wear women's clothes? Kibutsuji Muzan: Don't pin this on me. Take it up with Douma. Douma: Zhuyin-chan is cutest when dressed as a girl. Zhu Xiong: I just want to find my sister. The System thought it had found the right Host: his family had been killed, his enemy had turned him into humanity's adversary, and his older brother was the protagonist. But it never expected that after turning into a demon, Zhu Xiong would only want to find his family. This is an undercover System, not a find-your-sister System, okay?! A mountain of headcanons. Zhu Xiong's age is a personal setting, otherwise he's too young (doge). Pairing undecided. Premise: Exercise regularly to boost your metabolism