In the beginning the story, the alternate universe Symphogear World is under attacked by the jackal-like Black Arm. The alternate Hibiki and the others fights against the mysterious enemy. As they thought, Tsubasa and the others were beaten by the mysterious enemy, leaving Hibiki to stand alone to fight as Tsubasa and the othrrs looked at Hibiki while the enemy holds the alternate Miku as a hostage.
Miku: Hibiki!
Hibiki watches the enemy in horror that he holding Miku.
Hibiki: Let her go!
Mysterious enemy: Hmm, you seem to be angry at me. Hahahah, how amusing~.
Hibiki stares at him angrily.
Mysterious enemy: I am Infinite, the most powerful warrior in the universe... of every reality.
Tsubasa: Infinite?
Chris: The powerful warrior of darn universe of reality?
Maria and two girls became shocked while Hibiki still stares at Infinite.
Infinite: I'm like to stay a chat, but why don't you to want me to kill your best friend.
Miku see Infinite in horror after he saying to Hibiki.
Miku: Don't listen to him, Hibiki!
Infinite turned to Miku.
Infinite: Well, your best friend want you to save her. Hahahahahah.
Hibiki grits her teeth.
Hibiki (angry): Be quiet! I'm will Miku for matter what!
Infinite laughs.
Infinite (amused): Very well then. If you insist...
Infinite blast an tided Miku, killing her as a dirty trick.
Miku: Hibiki!
Hibiki see in horror at Infinite killed her as Miku's body disintergrates into Spirit Core.
Hibiki (cried): Mikkkkkuuuuuuuuuu!
Tsubasa and the others horribly see Miku's death.
Tsubasa: Miku...
Hibiki fell her knees and screams.
Hibiki: Graaaaaaaaaaaaah!
Infinite laugh evily.
Infinite: Whoops, sorry about that. I'm guess I accidentally destroy your best friend. Hehehahahah! Now you all bow down to my Black Arm army! Hahahahahahahahahah!
Hibiki grip her hands and screams in anger.
Hibiki: Infiniiiiiiiiite!
An very enraged Hibiki rushes towards Infinite.