“I’ll become a Twin-tail to protect the Earth!”
Souji Mitsuka is a normal High School student who is totally obsessed with twin-tails.
One day, a mysterious, beautiful young girl named Thouars shows up from a parallel world, but at the same time monsters appear in the town Souji lives in!
Monsters: “All the twin-tails of this world will be ours!”
These monsters from a parallel world live by feeding on the psychic energy of humans, “Affinity” (i.e. passion or feelings toward something). Thouars gives Souji the “Tail-Gear”, an armored suit powered by his strong Twin-tail Affinity (i.e. his love for twin-tails), and he transforms into the twin-tailed warrior, Tail-Red!
And thus begins the crazy battle between Tail-Red and the monsters!