A/N: Finally I can contribute to the RivaMika fandom! -cries tears of joy- This is also my first fanfic and ,well, I should warn you that the story timeline doesn't go according to the manga since I started this piece of work some long time ago and it's spoiler free since I hate spoilers unless I tell you..but in this fic I probably won't be putting spoilers -smiles- alright enough said. I hope you enjoy reading it.

Disclaimer: Nope, I don't own Shingeki no Kyojin(Attack on Titan) nor the precious characters in it -cries tears of sadness-

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Chapter I: The Accident

"ACKERMAN! TO YOUR LEFT!" yelled Levi. In less than the speed of the words spoken, the 15 meter titan had already been obliterated by Mikasa. Now, Levi stood back to back with her as they were alert for more upcoming titans. "I had that one already," Mikasa muttered as she gave a cold glare to the man behind her. Levi just glanced back, "Focus" was his only reply.

More than a year had passed since Eren, Mikasa, and Armin had joined the Scouting Legion. Eren had especially been under surveillance by the Survey Corps for a few months after they discovered Eren could turn into a titan. After the last incident with the Female, Colossal, and Armored Titans, Erwin had been studying into a new project of the "strongest" soldiers. However, no one knew how the new system would change the lives of three particular individuals.

Mikasa had now gone to the training camp section to work on sharpening her speed and direction with the 3DMG. "But you're already quicker than any one from the 104th squad" Armin told her as she was making her way to the training camp. "Not fast enough than the shorty," she murmured to herself and out of Armin's hearing range. "Well," he paused and looked worriedly at Mikasa, "just remember not to put so much stress on that leg of yours or else it could get worse." Mikasa nodded and off he went to the mess hall where he was called to meet by the superiors. She felt she needed to get better at it so Lance Corporal Levi wouldn't have to "bother" her about being slow.

While she changed into her 3DMG uniform, she noticed how the mild injury on her right thigh from the last battle had closed up already but could open any time if she wasn't careful. She decided it wasn't much to complain about and finished changing."I wonder what Eren is doing with his partner." Mikasa thought to herself.
Ever since Erwin had established the "Buddy" system, Mikasa had been in a bad mood since her partner wasn't either one of her beloved family. Since the "Buddy" system was based on ability, speed, and strength, it was obvious from the beginning that the Prodigy was partnered up with Humanity's Strongest Soldier. When Erwin had announced the buddy system would be composed of two soldiers, Mikasa became even more excited when he included a condition that the partners had to live together from now and then.

"It's like marriage without registration papers." Mikasa whispered with a blush. As Erwin dismissed everyone from the mess hall, Sasha, with Connie and Jean following behind, went skipping towards Mikasa. "Soooooo," she said with a grin as she put an arm over Mikasa, "you and Eren would be like newlyweds." Mikasa's face flushed a beet red and Eren, who was besides her along with Armin, choked on his own saliva. "W-We're just family," Mikasa stuttered as she pulled her scarf up to hide her blushing face. "Yeah," Eren interrupted with continued coughs, "besides remember Erwin said not everyone will qualify?" He gave a nervous laugh. "The ones who don't will return to the section squads like before." Armin added in with a warm,nervous smile. Mikasa, unnoticeable to others, glanced towards Eren with a sad look on her face knowing that she had all the capability to pass but wasn't certain if she would be partnered with Eren.

"Eren, I-"

"ACKERMAN!"

Everyone jumped, startled except for Mikasa, by the rich, low-pitched voice calling from behind them a distance away. Mikasa, with an annoyed expression from being interrupted, stood and saluted the Corporal. "Sir!" she said. Everyone watched as Corporal Levi made his way to them and stood with their fists on their hearts as well. "At ease Cadets." He said with his stoic face and turned towards Mikasa. "Have your belongings ready before sundown," Levi informed as he watched a confused expression spread across her face, "you'll be living as my partner now." After he left, an awkward silence was kept between the ones present.

Mikasa sighed thinking that maybe if she had retorted an argument back then she wouldn't had ended up living with the Corporal now. "Pointless," she grunted as she sliced through a dummy titan. She sped up and wasn't aware through her train of thought that her gas had ran out. "Damn it!" she exclaimed. Before she could reach the next tree to stand on, the maneuver gear gave a nasty screech. Mikasa hung by one steel wire as she rapidly crashed against a tree and passed out.

A/N: haha well this chapter was mostly to explain the system Erwin "invented" B) the good part will come later but for now please review and let me know what you guys thinks :D thanks for reading :)