Cabagge Hata no Isansouzokunin

On the outskirts of Glyn Glyn, there is a house among the fields of cabbage and cauliflower. Three old maids live in this house, and a boy who claims to be the orphan of King Britain Grable arrives. His name is Tarr Boo Beck. He is sent to school the next day, but strange things start happening, such as his hat exploding and cabbages coming from the fields into the house. It's a spell that Posy has cast that went wrong. The three are witches. Despite all this, Tar Boo Beck lives his school life, but one day, while Tar Boo Beck is in the classroom, Posy uses magic to deliver an umbrella to him. Tar Boo Beck is scolded for this and ordered to clean the principal's office as punishment. There, he discovers a secret: when thunder strikes, the principal transforms into a rabbit. It seems like everyone in this town is a little quirky...

(Source: Translated, Moto Hagio Works Library)