Life 1: A Mistake In Calculation
-Phoenix Foundation, Brave Mansion-
Three teens are gathered inside Sophia Brave's room in the Brave mansion. It is Sophia's usual group of friends which consists of who she claims to be two of her most beloved people in the world, Nanase Takeshi and Shijou Momoka. One is her destined person and the other is her best friend. It's not clear for the two subjects in question why she claims that but her Ancestral Magic is not really easy to understand.
The three of them are currently discussing something, it is about Takeshi. Nanase Takeshi is someone who came from the future due to a large explosion of magic that could bend space and time. After almost two years of being stuck in the past, Takeshi finally found a lead to how he can go back home to his own time.
"Hmm, theoretically it should be possible but…"
"But what, Momo-tan?"
"Uhh… it's extremely complicated. I know that it was the future me that sent Nanase-kun back to the past but I don't have the experience and knowledge of the future me."
Momoka brought up a fine point. They had figured out that only Momoka's Ancestral Magic could've sent Takeshi back in time due to its property. But to reverse the process through this timeline's Momoka is extremely hard. For one, the Momoka in the future has decades of experience and accumulated knowledge and her power had reached its peak. The current Momoka doesn't have all that and can't possibly send him back to the future, not yet.
"Can't anything be done?"
Takeshi asked. It's been two years and he's feeling anxious. A war broke out in his timeline and he needs to return. He can't just let his friends fight the war alone. But there is also another problem, one that makes it much more complicated than just time-travelling.
"Well, the time part can be done if we're talking about linear timeline but… Since we're not sending you straight to the future but a parallel future it makes things more complicated."
Yes, Takeshi was not only sent back to the past but to a parallel dimension. In this world, Ryuusenji Kazuma was not a magician and therefore Ghost Trailer never came to be. It was a mistake in calculation. If he was sent to his world's past, he could understand that he was supposed to do something about the future. But the future Momoka's mistake in calculation sent him not just to the past but to a parallel dimension.
Ghost Trailer does not exist in this dimension and there is peace. For two years he stayed with the Brave family thanks to Sophia who knew of his plight due to her Magical Analysis, her Ancestral Magic. He trained for two years straight in preparation for returning to his timeline and he's ready. The problem is, Momoka is not ready.
"Sending someone to the future is much more complicated than sending someone to the past. To send someone to the past we just need to displace them from their time and then place them into a known time. Of course, this is a simplified explanation. An analogy would be moving a book from one shelf to another shelf. You're putting it into something that already has a precedence and it exists. But sending someone to the future is like trying to put the same book into a shelf that is yet to be built. You don't know how it looks and there is nothing to place it on. And it's worse because not only are we going to send him to the future but also to a parallel timeline. This is not the case of the shelf not existing but you're trying to put the book into an inexistent shelf in another house!"
Momoka explained. It's frustrating really, and they have to do it because Takeshi is a key part of the war in his timeline if he's chosen by Momoka of that timeline to go back to the past. Momoka thought for a while. She cannot do both process of sending him to a parallel timeline and to the future all at once. She can either send him to the future or send him to a parallel timeline. Doing both is impossible… unless.
"…there is one, but much more complicated and roundabout way though."
"There is a way?"
Momoka nodded. She had not thought of it before and it is a crazy idea but it is the best they have.
"I cannot do both process of placing you in the right timeline and then send you to the future all at once. But I don't have to. I need to send you to a parallel timeline, one that will connect to your future, and then you can have that version of me send you to the future."
"Yes! That could work! Momo-tan is so smart!"
Sophia exclaimed while patting Momoka on her head. The chibi girl doesn't look too happy being pat on the head because she doesn't like being treated like a kid (even though she's one) but Sophia is the sole exception.
Although the solution is not perfect, Takeshi could accept it. After all, it's the best they have and possibly the only one they will ever have. He's already asking for so much from the two of them. The roundabout way is better than nothing at all. But… Takeshi stole a glance at Sophia who is laughing merrily as she glomped Momoka like she's a teddy bear. He knew that she is sad that Takeshi won't be staying. She really likes him from the first time they met and she has also grown on him in the two years he stayed in the Brave mansion.
Even if he already has Isoshima Kurumi, Sophia Brave had wormed her way into his heart and will forever be someone he cannot forget. Of course, the same goes for Momoka though in the chibi's case she is more like a mentor despite the difference in age… in both cases. He first met her in his future timeline when he gained the power to be a magician and she welcomed him to Subaru Magic Academy as its headmaster.
That Shijou Momoka is always cool, mysterious, knowledgeable, and has an air of authority and power, a truly high-class magician that could stand equally to Ghost Trailer's second-in-command. But this Momoka is, although also knowledgeable, is also much more relaxed, more expressive, and… sometimes childish. She feels more like a real teenage girl than the headmistress he had come to know.
He'll miss them once he got back to his time. It's going to be different. Even if he could meet Momoka again, the headmistress he knew is not the girl who is currently being annoyed by her best friend. And the Sophia he will meet won't be the same Sophia that he now knew. Even a part of him doesn't want to go back because all he will find is war while here he can live in peace with his two friends.
But Takeshi cannot abandon his friends. That's why he must go back, even if he has to take the long way around, if it is the only way then so be it. But that doesn't mean he won't feel a hint of regret.
-3 months later-
Momoka made sure that everything is perfect. There can be no mistake. She had spent the last year studying for this moment. This will be her greatest test, to help her friend return to his timeline. She's still far from being able to influence 'time' using her magic at her current level but she had switched her focus specifically to 'space' in the last three months and with a clear objective in mind, she is sure that she will succeed.
And today will be the day when she will see whether she succeeded or not.
The trio are now in Sophia's workshop. They had cleared the room in order to perform this magnificent piece of magic. After all, sending someone to a parallel world is a big feat, especially if it is their friend.
Takeshi is wearing his Wizard Brace uniform like Momoka while Sophia is wearing her Phoenix Foundation robe. The three of them stood in a circle around two meters apart from each other. Twilight is sheathed on Takeshi's waist lying dormant until it is called to battle. The only one with her Aspect active is Momoka. The enormous compass that towers over its own wielder stood ready in preparation.
"Nanase-kun, are you ready?"
The chibi girl asked. Takeshi nodded. He is ready. Once Momoka opened up a gate, there will be no turning back. Momoka cast a discreet glance at Sophia but the read head did not respond. Momoka took this as a sign that she had come to terms with Takeshi leaving. With nothing more need to be said, Momoka began her spell. She throws her Compass to the air and when it floats right above their head she began to chant.
"The road towards the night has revealed itself. The door to the endless void shall open. The journey starts with a single step, Black Arc!"
Her compass began to spin like a propeller and a black magic circle appear under it. From the magic circle, a pillar of black light shot down.
This is the magic that Momoka had been working on, a gate to another world. She had spent a lot of her time just to construct this spell and learn things beyond her age. This is truly the work of a prodigy. By entering this pillar of black light, Takeshi can be on his way back to his world one step at a time. first is to reach his timeline's correct past and from there, back to the future. Takeshi stepped forward with his face now inches away from the pillar of black light.
"I guess this is it. This is goodbye."
Takeshi said to Sophia. But the girl didn't reply. Her eyes are fixed on the pillar of light as if she's in a trance. Takeshi noticed her eyes. Her Ancestral Magic is active and her eyes suddenly widen.
"Takeshi, Momo-tan, get away!"
"Huh?!"
"No! There's a mistake in calculation?! No, this is outside interference!"
Suddenly the power of the magic increase several fold. The pillar of light began to expand, engulfing not only Takeshi but also Momoka and Sophia. Once the light disappeared, all three of them can no longer be seen. They have disappeared forever into the void… or did they?
-Unknown location-
Takeshi landed face first on the ground. He groaned as he tries to stand up. But the poor boy cannot stand up because a moment later Sophia and Momoka both landed on him.
"Uwaa! Takeshi, are you alright?!"
Sophia immediately got up along with Momoka. Takeshi groaned louder and tries to stand up again while holding his back which is currently in pain. Sophia helped him up while Momoka look around.
"Ugh, what happened?"
Takeshi asked as he is probably the only one who has no idea what happened. Momoka as the caster must knew about something while Sophia has her Magical Analysis.
"We failed… and succeed at the same time."
"Something interfered with the spell. I… I saw a large red dragon with four wings looking straight at us."
"A red dragon?"
Sophia won't forget what she saw. A giant red dragon larger than anything she had ever seen radiating an unbelievable amount of power. It had stared back at her and it had interfered with Momoka's magic. She had never seen anything like it and she probably never will again.
"So, where are we?"
The answer to Takeshi's question came not from any of his companion but a new voice.
"Well well well, what have we here?"
The three of them turn around to the source of that voice and cannot believe what they are seeing. A man is floating above them. He has a black hair with a mix of blonde and a small goatee. He looks to be middle-aged but none of those features matters more than what he has on his back.
Twelve feathery wings as dark as the night itself suspends the man in the air. He is the very image of what one would call a Fallen Angel.
"So, what are you three doing in Grigori territory?"
So I was reviewing about what I did in my Mikazuki of the Requiem story and decided to scrap that thing and do a legit Mahou Sensou crossover (at last!) after using the series' characters too many times. For those who only watch the anime, this takes place in an alternate version of Light Novel volume 7 and beyond. Which means this one is after the anime. Sophia Brave is a real Mahou Sensou character that appears in LN volume 7.
So the main character this time is Takeshi and with him is Sophia Brave and Subaru Mahou Gakuen's principal Shijou Momoka... when she was much younger. In volume 7 Momoka is just around 12 years old. Though her skill is unquestionable if she can match Kippei.
This is around 1 and a half year before canon timeline starts. There's a reason for that, mostly for Sophia's sake. Anyway, I hope this one is better than my previous Mahou Sensou attempt.