During a school trip, a bus full of students is suddenly transported to another world by a sage named Sion. She bestows most of the students with powers called Gifts, seeking to recruit them to become sages as well. However, a few are excluded from receiving a Gift, resulting in the others leaving them behind. Yogiri Takatou, one of the students who did not receive a Gift, wakes up to find a dragon attacking the bus. Amidst the chaos, he executes the dragon using his innate ability to instantly put anything to death. Alongside fellow survivor Tomochika Dannoura, Takatou sets out to find a way back to Earth, all while eliminating anyone who dares to underestimate him—including his former classmates.

Duke Fleed is a survivor of the Fleed Planet who is escaped to the Earth, onboard a mysterious "spaceship", where is raised by Dr. Umon as his adoptive son, and known as Daisuke Umon. Years after his arrival, he's faced with the threat of King Vega and his army, who want to conquer the Earth. With his friends Koji and Hikaru (and later his younger sister Maria Grace), Duke decides to fight back using his best weapon - the almighty Grendizer.

An unexplored dungeon, filled with monsters and traps. An expert thief, searching for her lost father. When Clay delves into the dungeon deeper than any adventurer has ever gone, she is offered a job by the dungeon's caretaker! Now, instead of exploring, Clay must learn how to interview new monsters, set traps and position slimes around the dungeon. Will this new career path bring her any closer to finding her father?

Nikola is just a village girl working at the inn...until the day dragons invade, and she meets Haga, a scholar of everything around him. He's a part of an elite society called "Seeker," created to address a series of maladies plaguing their usually peaceful world. But both Nikola and Haga have secrets they hide...ones that will change each other's very existence...