Recently got back to Muay Thai and it inspired me to make a martial arts fic.

"Hey, bastard."

"What do you want, Jean?"

Eren huffed as Jean sat beside him. After making sure Mikasa wasn't sitting with them of course. Armin scooted over to let Jean sit next to Eren.

"Do you remember the rankings back at the graduation?" the taller boy asked.

"Yeah, what of it?"

"I'm pretty sure I could've been fifth if it weren't for that stupid hand to hand combat bullshit. That's the only portion you're higher than me at!" Jean started to raise his voice on his ear.

"Yeah?! Then do something about it!"

Levi arrived and pinched their ears. "Shut the hell up. Instead of spouting bullshit, why don't you two just eat instead? Idiots." he lets go and walked away. Eren and Jean grimaced as they rubbed their ears to soothe the pain.

"If you weren't a damn titan, I'm sure as hell I can kick your ass!" Jean whispered angrily. "I don't need to become one to beat you, horseface." Eren replied.

Armin started to think about it though. 'Did Annie, Bertholt and Reiner ranked that high because they're titans? What about Ymi- oh right, she made way for Historia.' he gulped as he realized that Mikasa is an even bigger beast than the 4 titan shifters on the 104th top ten graduates.

"What do you suggest, Armin?" he heard his bestfriend's voice snap him out of his thoughts. "W-Well... I'm not one for violence..." Armin stuttered.

"Oh come on, we kill titans for a living." Jean reasoned.

"It's different from violence against other humans!"

"Just give a suggestion! You're the brains here, so your opinions are valuable." Eren said, growing impatient. Armin smiled at the compliment. "How about a bout? Winner is the true top 5."

Eren and Jean grinned at eachother. "Two months time, I'm going to beat the suicidal tendencies out of you!" Jean boasted.

'Oh boy. What have I done?' Armin facepalmed.

The next day.

"M-Me??" Armin asked in horror as Eren brought him out to an open field to spar. "Yes. You're the only one I can trust to train me." Eren said as stretched his tricep. "Well, I'm glad to hear that but-"

"Now! Put em up!"

"Wha- AAAACK!"

15 minutes later

Armin retreated to the barracks holding an ice pack on his forehead.

"Armin. Where is Eren?" Mikasa asked. "Oh Mikasa, thank God you exist!" Armin exclaimed in relief. Mikasa raised an eyebrow. "Listen, last night, him and Jean had this stupid contest where they would fight in 2 months' time to prove which one deserved the top 5 spot." Armin said quickly.

"Top 5? But that was a long time ago, why are they fighting for it?" Mikasa asked, trying to find some sense. "Well... You know how they are." Armin shrugged.

Mikasa however, had a great realization. If she can train Eren, she could make up for the time they spent away together. Nights are sleepless when she kept thinking about Eren being with Historia, and now it's her time to shine. "I got this." she smiled as she patted Armin's head.

"Ow! Not in the lump!"

Mikasa walked outside and saw Jean kicking a pad being held up by Connie. "Come on, Jean-boy! Horses are supposed to be strong kickers! Put some weight in to it!" Connie teased.

"Shut up or I'll kick you instead!" Jean replied.

The Ackerman shook her head and went on to the fields.

She saw Eren shadowboxing, she frowned when she saw him using Annie's stance. It's been months since the traitor crystalized herself, but she is still jealous of her.

Mikasa noticed it that he was more reluctant to fight her compared to Reiner and Bertolt, she also remembered seeing his worried face when Armin bluffed that Annie was being tortured in the inner part of the walls, making Bertolt go absolute apeshit.

But now, she'll teach him how to fight, Ackerman style.

Eren still hasn't noticed his yandere adoptive sister as he continued to throw punches and kicks to the air.

Mikasa suddenly ran towards him and kicked his thigh so hard he fell to the ground. "OW FUCK!" Eren winced.

"You need to work on your balance." he heard her monotone voice. "Mikasa, what the hell?! What is wrong with you?! Where is Armin?" he asked as he got up.

"He resigned due to injuries. I am here as a substitute." Mikasa said. "No way. I don't need you to trai-" Eren was cut off as she suddenly grabbed his shirt and lifted him up. "Want me to show you how good I am? Maybe I need to demonstrate why I'm qualified." she asked to which he fearfully shook his head. Mikasa lets him go and he landed on his feet on the green grass.

"Ugh. Fine, I'll let you train me. Just don't be a dictating jerk about it." Eren grumbled. Mikasa's lips formed in to a surprised, heartfelt smile.

Training montage.

Eren struggled continuing his pushups while Mikasa just kept doing her reps like a machine.

Eren felt like puking as they did their sit ups while Mikasa makes it look too easy.

"Ready, set-" Eren didn't listen and sprinted before she can even say go. 'Yes! I can beat her in running!' he thought with a smile but when he glanced back to see how far she is, she wasn't there. "Was I going too fast?" he halted and thought out loud. But when he looked forward Mikasa was sprinting like a motherfucker 30 meters away from him.

"Oh for fuck's sake!" Eren cussed out loud. He should have known, Mikasa was a beast among physical specimen, training with her will only make him feel inadequate.

Night came.

"So? How was your training?" Armin asked. Mikasa was actually showing emotion as she sipped her soup, she was smiling. While Eren's frown almost reached his chin.

"Damn that bastard!" Jean looked with envy from the other table. What did that bastard Eren do to deserve such a caring woman like Mikasa? And all that asshole does is ignore her or be harsh.

"You gonna eat tha-"

"Yes, Sasha! I will! Now hands off my bread!" Jean angrily snatched his bread from the woman.

The next day.

"Eren. I need to know if you-"

"Fine! I get it!" Eren punched his fists together and went to a stance. Mikasa stood there motionless, waiting for him to make a move.

They stared at eachother for awhile. Mikasa was smitten by his emerald eyes. This man, this handsome man glaring at her, was her hero.

On the other hand.

Eren glared at her with determination, with the intent to prove himself. Her genes are so hax, it's so unfair.

Mikasa motioned him passively to come at her (not like that, you fucking pervert)

Eren took a deep breath and started his charge with the usual "AAAAAAARRRRRRGGGGHHH!!!" scream.

It won't end well.