On a starry night, back when he was just 10 years old, Hoshikawa Subaru's life changed forever.
At 19:44 on one Friday night, he stared up at the stars, thinking of his missing father Hoshikawa Daigo, when suddenly he found himself face to face with an extraterrestrial. It was as tall as he was, made up of some green energy and covered mostly in blue armor that gave him somewhat of a dog like appearance. His name was War-Rock, and he was a being that resided on the electromagnetic spectrum. And he bought company with him, EM Viruses far stronger than the ones seen on Earth, and far smarter too, able to hijack the abandoned train at the far left of the plateau in an attempt to ram it into Kodama Town below. With War-Rock's help, he finally became able to travel through the very same lines he had gazed at for so long, through a reluctant fusion with the alien being that turned him into what became known as Mega Man.With War-Rock's help, he stopped the train and saved his home.
But that was just the beginning. Soon afterwards more aliens would show up, each named after the European-Roman Constellations. From Cygnus to Harp Note, and from Gemini to Wolf, these aliens, Fmians as they were called, would cause disaster after disaster across Japan, starting as something darkly silly as Cygnus causing oxygen deprivation by having people dance to death, to Libra nearly causing the deaths of hundreds of students by overwriting their brains with useless information thanks to the Study Wave, it was a wonder that he got out the incidents sane, but he could attribute his shockingly stable sanity to three factors.
The 1st was War-Rock. The alien was a mix between a decent/terrible father figure and an older brother whose experience in his field would always shock Subaru. For every single yell or whine about his boredom, he would educate Subaru on how to work their shared body, the weaknesses of the EM bodies...how to act on those weaknesses should they possess humans and separation was no longer an impossibility, but luckily his alien partner realized what the talks were doing to him and just stuck to Virus Busting tips. With his experiences in outer space, when he got War-Rock to use said experience, Subaru became quite the strapping 10 year old, a little Asian Fabio. He didn't know who that was, but all the adult women laughed and giggled at him whenever she said that.
The 2nd factor was his classmate Shirogane Luna,. While he was never close to her two friends, Gonta Ushajima and Kizamaro Sashoin, Luna made sure he knew who she was, whether he liked it or not, made sure he went to school, whether he liked it or not, and made it so that everyone in the town knew him, and he did not like it one bit. But he couldn't lie; it did him wonders. He now knew the names in everyone in Kodama Town, their schedules, their likes and dislikes...well the latter was because War-Rock numbed him to the consequences of invading people's privacy, but Luna was the one to get him out of shell, turning him into what War-Rock called her pack mule, or sometimes her little office b-word; though he didn't know what a female dog had to do with being Luna's pack mule, Misora-chan certainly got a kick out of it.
And that was the 3rd factor: Hibiki Misora. The retired J-pop idol who tried to murder him -something War-Rock considered a running gag, the evil jerk- became someone very close to him. If Luna could be considered his best friend...and maybe something more, then Misora could be considered his sister. She certaintly acted like one, and with the emotional support of her, Luna and her friends, he braved through Andromeda and stopped the continent of Mu from destroying the planet. Two times, two times he had saved the world, going into outer space, deep space, to different countries, and even the ocean. He had done more in his lifetime than any other person alive, probably save for Lan Hikari and Rockman, whose name he took inspiration from when creating his EM persona. Yes Subaru had done a lot, seen a lot, and met a lot of people.
But both he and Misora would soon find out that they haven't seen anything yet.
3 years have passed since those events. Technology marches on and such, and Subaru and friends have settled into their new roles as high school students.
And it was on this day that their lives will be changed forever.
And it was on this day that they would watch the town of Kodama and their world as they knew it, disappear forever.