Issei was not having the time in his life but was having heaven(he's a devil so... you know). No matter how much pain was conflicted against him, Asia's Sacred Gear would bring him back up again. The wounds would close and the pain didn't grow larger but it lingered. The pain was constantly on Issei's mind as his brain kept on screaming in pain even when his body was fully healed.
Besides pain, Issei was sure that Nee-san was using hax. He knew Nee-san was damn strong but when ultimately fighting face-to-face, he never knew his big sister was this good. Other than that his sister was ruthless. Her kicks simultaneously broke Issei's bones or ripped his muscles apart, her punches would bring Issei down to his knees or make him gasp for air and there was no hesitation in her attacks and no mercy.
But Issei could slowly feel the little improvements in the training. Before the training he couldn't even dodge Nee-san's punches or kicks, heck, he couldn't even hear them coming. But after he had been healed over twenty times, he could guess how Itsuka was going to attack him. Using his instincts and eyeing his sister's muscle movement, Issei was able to predict where the attacks were coming from and tried to dodge or block them. But, he was currently too slow to do that.
Diagonal Knee Strike
Hyoudou Itsuka Original: Overdrive
Re-Taekwondo Fist Strike
Re-Taekwondo Fist Strike×2 ×3 ×4 ×5
Re-Taekwondo Shilla
And Issei collapsed into a heap of bloody flesh once more.
"Medic!"
"Here Itsuka-san!"
Ten seconds. That was all it took to patch Issei up. Five seconds. That was all it took for Asia to scamper off to avoid danger. Then came the attack. That was repeated for twenty times but not forever… not…
Boost, Boost, Boost, Boost, Boost, Boost, Boost, Boost, Boost, Boost, Boost, Boost, BOOST.
SLAM
… this time.
Itsuka, who was not expecting Issei to attack her while Asia was hurrying away, was definitely caught off guard as she quickly nullified the shockwave through the ground by kicking it.
The Kick of Red Phoenix
But that was all what Issei needed. Throwing the dirt in his right hand which he had grasped during his recent knock-down, toward his sister's eyes he advanced towards his sister with his Sacred Gear raised.
[Boost , Boost, Boost, Boost, Boost, Boost, BOOST, BOOST, EXPLOSION]
BANG
CRUNCH
Finally… Issei's fist made contact with something… which happened to be Nee-san's left arm.
"..."
"..."
"..."
"Pffttt… Hahahahahahahahahahahahahahahahahahahahahahaha!"
"Nee-san? Are you… okay?"
"Hahahahaha… yes Ise… I'm okay…"
Itsuka flopped down onto the ground as her deformed arm moved wildly in different angles.
"You completely broke my left arm…"
"Ah… I'm sorry…"
"No need to be sorry Ise… I've already beaten you into a bloody pulp twenty times… Besides, we have the greatest healer with us… Asia? Can you heal my arm?"
"Hai Itsuka-san!"
Asia came jogging towards them and by some miracle didn't trip over which she did for all twenty times, when coming to them, going back or both. A green glow started to heal Itsuka as she wiped off the blood coming out of her mouth. The shock carried on throughout her body which rattled her bones and disrupted a few organs.
Damn… Thought Itsuka, feeling relaxed as Asia throughly healed her. Even when I have the eye of the King… I do have a mortal body… If I didn't guard at the last second, I might have gone into a coma or worse, I might've died if I was hit in the right place…
She then looked up to see Issei staring at her with guilt and worry. "As I promised, you will have a ten minute break starting from now…"
Before Itsuka finished her sentence Issei let out a sigh of relief as he fell on the grass heaving heavily.
"And no more attacking me while Asia is out of the way"
"Nee-san… you are one hell of a bitch…"
"Yeah…" I agreed, taking myself a rest too. "Yeah and you're a pervert Ise…"
"Hey! Don't mock what I am! I am Hyoudou Issei, an Oppai lover and the man, who will become a Harem King!"
"..."
"..."
"..."
"Ano… what's a 'Harem King' Itsuka-san, Issei-san?"
"..."
"You really are unsavable, aren't you little brother?" I said choosing to ignore Asia's innocent question. "Well… then as a big sister it is my duty to help you become one… like I promised when we were young…"
"Yeah… I remember those days… You and your fairytales which all turned out to be true... Man, I miss Irina… Remember us three? We were inseparable… always playing with each other, always hanging out with each other… and your pet dog… I still remember that bastard… always biting the heck out of me whenever he got the chance to do so... He always listened to you and when he was growing on me you had to let him go into the wild… God— YEOWCH!" Issei yelped, clutching his head.
"I-Issei-san! Are you alright?"
"It's okay Asia… It's just a side effect from becoming a Demon…" Said Issei reassuring Asia. "... I really need to become strong, Nee-san… After fighting those Executives, I realized that I was so weak even when I had this amazing Sacred Gear. I never felt so helpless in my life, stuck in the mud watching Buchou and my friends hitting the dirt while all I could do was attack them which had no effects... Lying on the dirt my eyelids heavy even when I knew that Asia and you were still stuck in that church, still exposed to danger. I really need to get stronger so I can properly protect everyone..."
"You're growing Issei," I said, pushing myself up to a sitting position. "You're growing fast and steady. Heck, I never knew you were going to manage to land a hit on me… But you… surpassed my expectations."
Issei smiled and blushed with pride as he accepted the compliment from his own dear big sister.
"Now stand up. Ten minutes has already passed."