"This world isn't so bad, as long as we have each other." It tells the tale of three makeshift siblings-Rena, Reap, and Sou-who are suddenly forced to leave their original world, known as the Otherworld, after it collapses. They are thrust into another realm, a place full of unknown dangers and unfamiliar rules, and the series follows their journey to survive, adapt, and find purpose in this new world. They will encounter never-seen-before inventions, new allies, unexpected friendships, new discoveries, and powerful enemies.