So... is Soredemo Sekai wa Utsukushii finished or not?
NO, it is not finished.
Why?
The anime finished before the manga:
Anime finished: June 29, 2014
Manga finished: May 20, 2020
MangaUpdates contains information about the anime adaptation and indicates that it is incomplete.
Watching Order (by release date)
Here you have all the anime relations we detected ordered by release date, so you can see the reason for this status in context and also use it as watching order.
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Synopsis
Soredemo Sekai wa Utsukushii tells the story of Nike, a princess from the Rain Dukedom, a land where people can control the rain.
She's betrothed to Livius, the young and powerful king of the Sun Kingdom, a land that has never known rain.
Rumors paint Livius as a fearsome and ruthless tyrant, leading Nike to fear her upcoming marriage.
However, upon meeting Livius, Nike discovers he is far different than the rumors suggest, and the anime explores their relationship as they navigate the challenges and intrigues of their respective kingdoms.