Instrumentweapon Stories

It's a story when Miku, Rin, Len, Luka, Kaito and Gumi of Vocaloid was summoned to the KHR World by the help of the wizard kids who are watching them from a magic crystal ball. The Vocaloid will also fight against the enemies of the Vongola. But their stay in the KHR World is only limited. Can they ever face the challenges that will come up on their way? Can they ever come back to their real world? Or would they forever remain in the world they enter?