Momo

On her sixteenth birthday, Odagiri Yume, a disinterested and aimless teenager, rescues Momo, a high-class and beautiful girl who identifies as the Devil. Yume expresses a desire to become significant, and Momo fulfills it by appointing her as the Earth's representative. From her sixteenth to eighteenth birthday, Yume must provide seven valid reasons for Momo to spare the planet. A global countdown to destruction has started, and only Momo has the power to halt it. The story also includes a one-shot where a popular student at Komai's school approaches her, despite her preference for solitude and personal space.