In a world where beasts tagged as“#threat” wreak havoc， people live in a harsh natural world. Hikaru， who pursues excitement， fights against the ferocious beasts by tag-teaming with the “fairy” who possesses special abilities.However， constantly losing to overwhelmingly powerful beasts is not exciting. The “Tag” of humans and fairies vs. the tagged beastsー　Tag vs Tag， the battle for their lives， is unfolding now...!