Devil Survivor 2 The Animation
Shin Megami Tensei: Devil Survivor 2
デビルサバイバー２ THE ANIMATION
Mysterious invaders called the Septentriones arrive in Japan and begin attacking the country on a Sunday. To fight back, the heroes in Devil Survivor 2 signed a pact with the devil to become the Thirteen Devil Messengers. The Septentriones show up at least once a day and you have a time limit of seven days to defeat them.
(Source: Megami Tensei Wikia)