DS2A, 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.