"What if the summoned heroes weren't modern world humans but experienced warriors, or at least a couple of them?

Alison, the heroine, disciple of the sacred warrior who defeated the King of the Underworld, has been summoned. Her duty now is to fight against the threat. Being a genius, she must follow in her master's footsteps and become the hero of this world, as her mentor Merlin once was in his original realm.

Meanwhile, Merlin, the last sacred warrior who saved his world, yet whose role isn't finished, along with his companion Kira, a Siberian Husky, is needed in another world. Besides aiding his beloved disciple, perhaps his powers have weakened, but his experience and skills remain intact!

Monsters, demons, aiding the people, waves of chaos—what does one need to confront to be considered a hero?

Talent, experience, knowledge—will these suffice for this battle?".