In the city of Orario, beneath an impossibly tall tower, lies the dungeon. Only adventurers who form partnerships with the gods themselves have any hope of defeating the monsters that lie within. But the dungeon is not the only place where monsters exist. Far from Orario, in the ruins of an ancient city, a new threat arises. To counter this threat, the goddess Artemis has come to Orario in search of a champion-but it's not Ais Wallenstein (the legendary Sword Princess) nor Ottar (the strongest warrior to ever enter the dungeon) that she chooses. Rather it is Bell Cranel, a newbie adventurer partnered with a low-tier goddess.

In an underground world where tunnels extend everywhere, even though they live in dark and confined spaces, people wear protective clothes and lead quiet and enjoyable lives. Patema, a princess in her underground village, loves to explore the tunnels. Her favorite place is a "danger zone" that her village prohibits people from entering. Even though she's scolded, Patema's curiosity can't be held back. No one ever explained what the supposed danger was. On her usual trip to the "danger zone," Patema faces unexpected events. When hidden secrets come to light, the story begins to unfold.

The movie adaptation announced at the end of the final episode of Date A Live II.

The planned film trilogy retells the beginning of the story from Shuuichi Shigeno's original car-racing manga. High school student Takumi Fujiwara works as a gas station attendant during the day and a delivery boy for his father's tofu shop during late nights. Little does he know that his precise driving skills and his father's modified Toyota Sprinter AE86 Trueno make him the best amateur road racer on Mt. Akina's highway. Because of this, racing groups from all over the Gunma prefecture issue challenges to Takumi to see if he really has what it takes to be a road legend.