The prideful archangel Lucifer disobeys God and is cast into the lowest level of hell as a fallen angel. On her way to hell, Lucifer happens to meet a high school girl on Earth named Maria, who helps her. In hell, Lucifer meets Leviathan, and Leviathan explains to Lucifer about The Seven Deadly Sins, the seven demon king rulers of hell. After The Seven Deadly Sins seal Lucifer's powers, Lucifer goes on a journey with Maria and Leviathan to defeat them.
English: Seven Mortal Sins
Japanese: sin 七つの大罪
Status: Finished Airing
Aired: Apr 15, 2017 to Jul 29, 2017
Premiered: Spring 2017
Broadcast: Saturdays at 00:00 (JST)
Producers: Genco, Lantis, AT-X, Hobby Japan, NBCUniversal Entertainment Japan, Kanon Sound, Orchid Seed
Studios: Artland, TNK
Genres: Ecchi, Fantasy
Duration: 23 min. per ep.
Rating: R+ - Mild Nudity