Story (8/10):
In my opinion, this is the best season of Ojamajo Doremi since it serves very well as a complement to the others, the ova format made the themes can be developed much more freely since this time there were no age restrictions.This can be noted for example in chapter 4 (Where Onpu is developed and the idol industry is criticized in a very subtle way) or in chapter 12 (One of the most tragic chapters of the entire franchise).
All the chapters are worthwhile and develop themes and characters that had not been touched in the other seasons. Even the worst episodes are decent and entertaining (Like episode 9).
Art and sound (7/10):
The ova format made the anime had animation and music 10 times better than the other seasons. I like the opening and ending.
Nothing more to say about it.
Character (8/10):
In this season, the characters who did not have the opportunity to have a chapter in other seasons were given time, new characters were also introduced and the protagonists were further developed.
This season shows how one can become fond of a character in a single chapter if the execution is good.
Enjoyment (9/10):
In my opinion all the chapters were very entertaining.
Nothing more to say about it.
Overall (8/10):
Ojamajo Doremi Na-i-sho manages to be a very good complement to the franchise, his themes develop better than in other seasons and with slightly more mature themes touched with subtlety.