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. Source: ANN
Theoretical best: H-Enc+Tenrai-Sensei
AOmundson is Amoeba+RH (Restyled CR with improved TS and Romaji OP/ED) Tenrai-Sensei is AOmundson with KFX and official TL for the OP/ED H-Enc fixes the terrible chroma in the store