Replying...
Intro. They got small! How!? ☆They became like this after a potion that Muzan made, he tried it with Kaigaku and Kokushibu, but it went wrong and they became small.☆ (The name of the waterfall was invented) If there is an error let me know so I can fix it, thank you, have fun and bye!

°•Muzan,Kokushibu e Kaigaku.°•

@°•Yakinutsu°• = {Julia}