As war continues in the future, a mysterious vortex opens up and begins to devour everything in it’s path. One such soldier is sucked into the vortex and thrown into the past, more specifically, the year 2014. When he finally deduces where (and when) he is, he sets out to fine a presumably notorious man by the name of “Aoba Watase”. Aoba, a young high school student, during this time was just starting school from his summer vacation. Just barely making it on time, Aoba meets up with his friends who tell him his new seating arrangement. He was to sit next to Hina Yumihara. Although he’s never talked to her much over the years, there was something interesting about her that peaked his interest.

After school, after playing some basketball with his friends, Hina gets an alert of incoming danger. Despite her efforts to secure the three friends, the unknown mecha soldier lands at Aoba’s school threatening to obliterate him. Missing the first shot, the four classmates run for safety throughout the school. Managing to separate himself from his friends, Aoba manages to escape into the city in an attempt to outrun his assailant. Mina, managing to catch up to Aoba, tell him to follow her, as she can save him. Confused, Aoba follows her to a warehouse, to which he wonders if she’s inside. Too late to react, the soldier towers over Aoba ready to attack again. Attempting to run, Aoba is corned by another unknown mecha. However, this one is revealed to be Hina. Upon staggering the opposing mecha, she tells Aoba to come with her.

As the skirmish between mechas carry on, Hina is able to subdue her opponent. Given the time, Aoba questions her on exactly what was going on. She explains that she was a time-traveler, who came from the future to protect Aoba from this exact incident. When he asks her how she knew this would happen, she told him that his future self had warned her. Having completed her mission and causing an uproar, the police and tourist begin to gather around and Hina prepares to leave. However, much to their surprise, the assailant rises again, grabs of hold f Hina’s mecha, and prepares to self destruct. In a panic, Hina tries her best to get loose, but to no avail.

Keying into the anomaly that sent the soldier back in time, Hina believes the only way to save Aoba is to send them both into the vortex. She asks Aoba to put his faith into her, which he does rather easily, causing her to blush and berate him for putting his faith in people so easily. Barely getting through the vortex, the soldier’s Valiancer explodes and Hina begins to explain that everything will be okay. Sharing a sentimental smile, she tells him that he is going into the future where a man named Dio is awaiting him. Hina then begins to fade away into the light of the vortex, leaving Aoba to await his fate. Waking up into the future, Aoba finds himself within the Luxon Valiancer on a battlefield surround by two opposing forces.