one day, Furina, Hydro Archon and ruler of Fontaine, while walking through the forest, drank an unknown liquid out of curiosity, and it turned out to be a potion, which made her a small 4-year-old child. and until an antidote is found, Neuvillette, Fontaine's judge and her familiar, will become her nanny!

and now, Neuvillette was already holding a bundle in his arms, in which little Furina was lying and sucking a pacifier. they were in her room. oh... and what should he do next...