A surge of booming explosion from two unstoppable force collided. They continuously move in lighting speed with each attack causing a devastating impact.
Vali who was already giving her all wasn't able to take any advantage from the constant assault. She was rapidly becoming weaker from overusing her power but push herself even further.
She could feel her power was rising incredible speed like something within her was returning. Vali heart pound from their battle and thought it was the joy of fighting her rival. However there is more to it than that.
'Amazing expected of my mate! Wait why did I thought of that!?'
Vali was confuse from the sudden words that came to her mind but didn't have time when Issei shot a immensely powerful attack.
"Dragon shot!!"
Its power could be felt from the whole dimensional plain which is triple the size of Kyoto. Thankfully powerful barrier with the concept of infinity was place or it would cause it collapse.
Vali was send flying to the air with immense speed but was able to stopped herself in time when Issei reappear beside to launch him downward but manage to block it and descended in lightning speed to the ground creating a power earthquake.
"Did I overdo it?"
Issei pause for a moment but lazily evade a powerful kick from Vali who was in her normal balance breaker but something was different. She still retain the power of the juggernaut drive enabling her to counter Issei by spinning around then punching him straight to the face launching to the air.
Not wasting anytime, Vali disappear and reappear at the Issei who trying to get up did a round house kick that cause the nearby small mountain to be obliterate from the aftershock.
"Hahaha I didn't expect to grow this strong while fighting you!"
"Not bad but…"
Issei swipe his hand pushing the smoke away appearing unscathed shocking Vali. She couldn't believe even a tiny scratch was no where to be seen. From that moment enormous amount of demonic energy erupted from Issei finally release his full demonic energy.
From that Issei armor change that glimmer in radiating crimson light unlike before. The power Issei had was much more calmer than the raging energy he kept surprising. He scanned his body smiling inside his helmet.
"Thankfully I didn't to do the chant."
Issei was able to unlock his other power due to having strong connection with Albion and Vali. He was slowly regaining more and more of his Dragonic side when he fights vali. He doesn't know the reason why but accepted it while smiling.
"Hahaha you really interest me more and more!"
[Vali be careful! You are reaching your limit.]
"I don't care this is once in a lifetime I can fight someone this strong. Also don't you want to defeat the red dragon emperor."
[I do but if you lose then we have to pay our bets.]
"Hahaha I don't mind becoming his since he might give me better child than anyone could."
"I hope your ready because this is going to be our final showdown."
"First tell me what's the name of this form!?"
"Cardinal Crimson promotion which allow me to use all the chess pieces of the evil pieces system."
"Oh that's what it is!? Interesting I didn't know that those devil faction would be able to produce something."
"They didn't because I overwrote it but lets stop talking and fight."
"Bring it on!"
From their moment created mirage of images from the immense speed they were displaying. The weaker spectators couldn't see what's going on while the slightly stronger one are barely able to keep up from their speed.
[DIVIDE!DIVIDE!DIVIDE!DIVIDE!]
[BOOST!BOOST!BOOST!BOOST!!]
Both of them fought for their lives continuously growing stronger by the minute they battle. Issei could feel his power was now at S rank High God class or to a heavenly dragon in their prime. His based power without boosted gear was now at D-rank Low God class.
[A/N: note this only a estimate not the actual power. For example if Vali meet her grandfather then it would be lower.]
Meanwhile as they fought, Vali heard something shatter from within her then countless images flooded her mind causing her to stop. She felt a surge of emotion that resulted on her power to become unstable and collapse. Her scale mail disappear and gradually descended from the sky.
Issei who saw this pause for moment until he saw Vali scale mail disappear leaving her body descending. He quickly flew towards her then saw that she was clutching her head while tears fall from her eyes.
"Vali are you alright!? Talk to me!"
Issei remove his helmet then called her name with concern as she wasn't responding, afraid that he had done something but was bewildered when she grab both cheek then gave passionate kiss. Fortunately, the only witness was Irene who teasingly smile while the rest wasn't able to see anything after Azazel gadget was destroyed.
"Jeez I didn't expect to regain my memory."
"Wait vali you remember me!?"
[As do I, darling.]
Albino seductively said that was heard by Irene who glare at her having staring contest and agreed to suck him dry afterwards together to see who cum first. Back to Issei he had mix feeling between happy and worry.
"Wait how did you guys gain back your memory?"
"I don't know but our fight might had cause a link between us. Still I don't care I remember you that's all that matters."
"hahaha really now then you don't might saying I won?"
"Of course you won the battle but not the war. Wait until we can do it again in the bedroom."
[Count me in that.]
Issei smiled putting aside the cause of how Vali regain her memory knowing it was part of another labyrinth plan of Big G.
_______________________________
Both of them return to everyone where they asked question who won and told that it was Issei making everyone surprise that the two heavenly dragon had finally decided.
They were shocked that Vali would be that strong despite knowing her for a long time. She kept her memory a secret knowing Issei would have told them if there wasn't a reason. Though, Kuroka didn't left it unnoticed how Vali bold action with Issei.
"Does Vali-chan be Issei mate nya~"
"Yeah that's right, Congratulation Vali hahaha."
"Be careful Bikou or you might cause her to punish you again."
Bikou became silent reminded of the time when Vali torture him for pulling pranks. Issei saw and could already guess how painful that punishment would be.
"I don't mind it! Lost is a lost. It sully my name if I don't comply and its not like I'm losing anything since Albino would gain a body while I can have strong mate."
"Vali-chan is right nya~. We will have a strong mate."
The rest of Murayama and her friends congratulate Issei though the former was a bit pissed but doesn't mind since as long they know how Issei is great. If don't then she'll murder them in their sleep. Valerie was happy that Issei gain many woman which meant she would have meant friends.
Meanwhile, Le fay felt weird when she looked at Issei time to time after the fight. She was also being affected by his charms that went unnoticed by Arthur. He contemplate if Issei is suitable man for her sister since it would give a powerful heir for their family. Though, Arthur a bit surprise from his own thoughts about it.
"Good you know what a lost is albino."
[Don't get too overconfident bitch but I have you don't back on your words of giving back my body.]
"Hmph alright Valerie-chan can you help me for a moment."
With that Valerie use her sacred Gear to revive Albino separating her from Vali but still leave a connection to the two similar to Issei and Irene. From that a yet another powerful pressure weight than on them but Issei use his own to counter it letting the weaker one breath easy.
"Haaaa….Its been sooooo long since I felt alive."
The smoke gradually dissipate revealing gorgeous mature white haired woman dress in white dress and shimmering earing with golden ornament around her body. She was like a goddess descended from the heavens.
"Now then shall we head to the bed?"
"Right back at you."
With that both heavenly dragon hungrily looked at Issei then dragged him into the bed. Issei put aside the thing he needed to do like visit Ingvild.