Human civilisation is on the verge of extinction as a result of decades of plummeting birth rates. With only a few people living, they make do in this post-apocalyptic world with what the previous generations left behind. Fairies, small beings with very advanced technology, a passion with sugar, and a blatant disregard for human safety, now rule the Earth. A young woman who has recently completed her studies returns to her hometown after being appointed as an official United Nations arbitrator. Her role is to act as a bridge between humanity and fairies, ensuring both species that they may coexist happily. She believes this mission will be simple enough, but she underestimates the difficulty of regulating the calamities caused by the heedless fairies in their chase of candy will require a lot more effort than she initially believes.