If you're looking for anime similar to Tosca, you might like these titles.
The second season of Immemorial Love For You.
The story centers on Otarō, a creature themed around dirt known as a yogoremon. It and other yogoremon will ask the meaning of words and explain negative terms in positive ways.
At some point, children diverge from the ideal path set forth for them by adults. The trigger is usually a trivial incident.