uki Masato is an ordinary high school boy who is magically transported to an alternative world, but for some reason his doting, over-protective mother comes along as well.
A long time ago he made a promise on the ice field where death and snow were intertwined. Years later, Necromancer Burris worked very hard to finally break the curse of the ancient gods and let the imprisoned Skeleton King leave the Marsh of the Dead and return to the human world.
a certain day, a certain thought came to Japan’s Sun Goddess. —— Aren’t there too many Japanese people being abducted to other worlds? It’s true that the large majority of Japanese are diligent and docile and soft-hearted, which makes them pretty much the best people to ask for favors. “But recently it’s just gotten way too out of hand…… Oh, I’ve got it! Whenever a Japanese person is summoned, I just have to summon an otherworlder!” And now, every time a Japanese person is summoned, princesses and elves and beastmen and whatnot are reverse-summoned. Under the acknowledgement of the government, they begin living in Japan. Today, too, Japan is at peace. And so begins this laidback isekai cultural exchange story♪