Y/N POV
After the ten days of training and developing their skills, I sat and watched the rating game along with two others both girls with black hair and glasses although one had short hair with dark rims while the other girl was slightly taller with hair that reached her knees and blue rims they're names where Sona and Tsubaki. Sona was the king of her peerage while Tsubaki was the queen and they belonged to the house of Sitri.

(Sona left, Tsubaki right)
The rating game was set in a copy of Kuoh academy with Rias' home base in the ORC club room while Riser's base was in the principals office. Riser had the advantage in numbers having a full set of 16 including himself while Rias only had 6 including herself, Riser also had the advantage in experience having played 10 rating games and he only lost twice only out of respect to the other houses. What made him so unbeatable was his peerage having access to pheonix tears, something that fully healed and rejuvenated the user, while he could naturally regenerate as him being a descendent of the house of Phenex gave  him the a pheonix's regeneration.
It went well for the most part for Rias' peerage then it all went down hill and Rias gave up so Riser wouldn't kill Issei. Now with the rest of the Khaos Brigade, Kuroka and I are formulating a plan to stop the wedding, not for Rias but because he'll have control of both peerages him being the perverted man he is will no doubt do something to Shirone.
"I think the only thing i can do is have you teleport me there and i stop the wedding" i tell Kuroka as she looks at me in worry "I can come too" she offers but i put my hand up telling her to stop "No you can't, you're wanted by the Devils and i don't want to risk you being caught" i rebut before she gives in and readies a transportation circle. "Just be careful, okay?" She says, i get up and hug her reassuring her "Of course i will be, who do you think i am, Bikou?" I respond as i walk into the magic circle as she giggles before teleporting me there.

Two giant doors are infront of me as guards approach me "hold it you, invited guests only" one of them tell me as i chuckle before appearing behind one slamming his head into the ground before rushing to another kneeing him it the gut ad he hunches over i elbow him in the back of the neck and throw him at the last guard as he gets thrown back with him. I kick open the doors as all eyes turn towards me, i dpot Rias looking atcme with hope in her eyes and Riser looking very pissed off "Riser Phenex! I challenge you to a battle!" I call out to him "Leave, Can't you see Riser is having his wedding?" He responds before a red headed man and eyes the same colour as Rias calls out.

"Now hold on Riser. If you win what do you want?" he asks me as Riser gets even more angry. "I want this marriage and all  marriages to Rias Gremory and her peerage to be called of unless they agree to it" i state my demand to him. "And Riser what would you like?" He asks while Riser's settles and he gains a cocky smirk "Riser wants this boys head!" he exclaims as the terms are set and Riser and I are teleported to a battle grounds which is an arena with a giant chess board in the middle but no pieces to accompany it. "Are both combatants ready?" The red heads voice calls out as we nod and he continues "Then let the match BEGIN"
Riser immediately charges forward on wings made of flame as i dash forwards bringing up my shield to block against oncoming fireballs, changing my right arm to it's whip form i throw it towards Riser and it latches around his arm. I pull him forwards as he's helpless to my superior strength, bashing him with my shield when in range i change my right arm to a claw slashing at his top half in his moment of weaknes. He cries out in pain as i jam my claws through his stomach, but he quickly shoots out a gigantic blast of fire sending me skidding backwards dislodging my hand from him and cracking my shield.
I look forwards to see him regenerating "See boy, challenging Riser was stupid! Riser can heal from anything!" He shouts while his wounds finish healing, "But can you withstand the pain?" I ask as he looks at me in confusion, changing my right arm to a blade i charge at him blocking fireballs as that further the crack in my shield as i get close slashing him chest he staggers back i cut off his hand and reach for his face cut out his eyes. He screams in pain while sending out massive blasts of flame in every direction ,as he can't see, tryung to hit me as i get hit point blank destroying my shield as scalding me.
I change both my arms to hammerfists while he regenerates jumping at him smacking him in the stomach as he burns me slightly, reeling my arm back i attemp to hit him but i eyes had healed as he dodges and hits me with flames sending me backwards. On my knees i rest panting with burns covering me, my arm back to normal as i stick my hand out and shout "ALUCARD LEND ME YOUR STRENGTH!" a purple light blinds Riser as he covers his face. It dies down revealing a sword, i push off from the ground using the last of my strength i manage to impale Riser with my sword a purple light surrounds me healing my wounds heal and magic is restored.
Riser struggles to push it out of him as i push the sword deeper while he hits me head on full force with his flame but i heal as quickly as he damages me. Summoning up my Magic and pushing it to the limit i hear a familiar voice call out "BLACKLIGHT BALANCE BREAKER!" out loud as the armour covers me increasing my strength tenfold i rip the sword out of him no longer feeling the affects of his flames i lower my swords between his legs and swing upwards slicing him in half. A voice cried out "NOOO!!!" as a girl who wears her blonde hair in twin tornados along the sides of her head runs towards Risers barely regenerating body.

She pulls out a small vial as she drops the contents on him he quickly heals.
"The winner of the match is Y/N L/N "The red head announces as we are teleported back to the ballroom and Rias dashes towards me and envelopes me in a hug, I deactivate my balance breaker and push her off me "I didn't do this for you" i tell her as i open a transportation circle and head back to Kuroka.
Arriving in our room i see Kuroka sitting on our bed as she begins to speak "Did it go well?" She asks as i smile and nod as she returns the smile hugging me, i return the gesture finding comfort in her warmth "How'd you do it?" She questions breaking away from the hug and returns to the bed. "Well i beat up some guards, challenged him to a fight, unleashed my balamce breaker and sliced him in half the the over cooked chicken he is" i tell her sitting next to her. She giggles at my retelling grabbing my arm and making me lay down. She sits on me and holds my shoulders "Well i think after all that, you deserve a reward~" she cooes and leans in i meet her half way as we kiss for several seconds before wrapping her arms around me and separating laying her head on my chest i grab the duvet and throwing over us before wrapping my arms around her.
We slowly drift of to sleep as she purrs lightly.

"I love you Y/N" she tells me

"I love you too Kuroka" i admit letting myself falls asleep

(Holy shit 1.96K reads and 10 parts later and we did it. I never expected this to even get read so to everyone thank you so much and let me know if you want season 2)