So... is Sin: Nanatsu no Taizai finished or not?
YES, it is finished.
Why?
This is an original anime and all detected relations are finished. Check the release order section for a complete list of relations.
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.
The mangas and the non-core contents are excluded by default, but you can enable them by clicking the buttons below:
Synopsis
Lucifer, a powerful Archangel, is cast out of Heaven for rebelling against God.
She falls to Hell, where she encounters Leviathan, an aspiring Demon Lord.
Together, they plan to overthrow the Seven Sins, the rulers of Hell.
However, they are defeated, and Lucifer is cursed with a Garb of Punishment, weakening her powers and transforming her into a Demon Lord.
Seeking revenge, Lucifer, accompanied by Leviathan, travels to Earth.
There, she enslaves a human girl named Maria.
Lucifer, Leviathan, and Maria embark on a journey to defeat the Seven Sins and break the curse of the Garb of Punishment.