Blood demon art but in reverse accident happen to all 12 Kizuki being back to kids but they are still don’t know to use their own blood demon art and Muzan kibutsuji has to babysit them

1. Small kid Daki and Kid gyutaro
2. Baby hantengu
3. Baby Gyokko
4. Kid Douma
5. Kid Akaza 6.Kid Kokushibo 7.Kid Nakime