It will premier on April 14.
The official website for the anime inspired on Hobby Japan´s multimedia Project “ Seven Mortal Sins” has uploaded a new promo for the anime, needless to say it has a lot of Fan-Service, so might people could find it NSFW.
Anime News Network describes the story as follows:
“In the story, 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 Mortal Sins, the seven demon king rulers of hell. After The Seven Mortal Sins seal Lucifer’s powers, Lucifer goes on a journey with Maria and Leviathan to defeat them.”
Via: Anime News Network