Your a young high school student and an avid anime fan who dreams of writing your own light novel. While watching the anime adaptation of the mecha light novel Elemental Symphony of Vogelchevalier to look for inspiration, the tablet computer you’re watching it on sputters and drags you into the anime's world, where you witnesses a battle between the anime's character Selesia and a mysterious girl wearing a military uniform. After returning with Selesia, you discovers that other characters from different stories and forms of media were also brought to the real world, with some of them aligned with the military uniform princess, who promised them the ways to end the strife in their worlds and a way back home, unaware of her true intentions. To stop her, you and Selesia agree to find the other characters and bring them home; lest the military uniform princess will bring untold destruction to every world that exists.