Synonyms that are in the dictionary are marked in green. Synonyms that are not in the dictionary are marked in red.
Antonyms that are in the dictionary are marked in green. Antonyms that are not in the dictionary are marked in red.
Another factor that Kuromi's Pretty Journey takes advantage of is YouTube videos being free to watch.
Source: https://www.cbr.com/sanrio-kuromi-pretty-journey-short-series-anime-youtube-success/