Have you ever thought that behind the city filled with neon lights, monsters from ancient tales reside? Have you ever thought that high above the sky, behind the moon, stood a G** watching over the mortal world? Have you ever thought that in this crowded 21st-century city, there are superhumans who are Seraph's agents? In this society ruled by humans, multiple weirdness lurk within. Mikaela the Seraph, Hades the Ruler of He**, Poseidon the G** of the sea where have the Gods of Xia gone? In this world that belongs to "man", "Mythical beings" must be eliminated.