"So you can change appearance... when you control the body... like if Chloe controlled the body you would look like Chloe and if Ruminas did took control you would looked like Ruminas" asked Issei or Rimuru
A/N: I forgot about Testarossa, Carrera, and Ultima so I'll add them now anyway!
-_-_-_-_-_-_-
We Skip the day when Rias and her peerage was fighting Riser Phenex Peerage and surprisingly they eliminate all 14 member of Riser peerage although it's all thanks to Issei
"...huff...huff...huff... last two and we win!" Issei shouted and anyone could noticed the happiness on his voice but...
"Rias... Queen, Knight, Bishop, and Rook retired" Grayfia exclaimed
"Oh come on!" Issei muttered whining
Issei then went to the student council room and saw Ravel Phenex the little sister of Riser she was there smirking while looking at Issei
"Give up already you can't against us even only me and my big brother was left" Ravel said
Suddenly an explosion happened and a part of the room started to collapse both noticed it and Issei rush towards Ravel and carry her in a princess carry and started running away avoiding some falling debris
Ravel just hold on to Issei tightly while looking at Issei her heart started beating a little faster and her face heat up a little and a slight blush appeared on her face
"Promotion to Queen!" Issei shouted although he wasn't part of the Rias peerage, he just wanted to act
Issei then shoot a energy ball at the wall destroying it and after that he jump and use Black Whip and use it to swing and in luck had it he landed next to the fighting Rias and Riser and he place Ravel down gently
Fortunately there's a smoke so both Rias and Riser couldn't see and they were both fighting so they couldn't hear both Issei and Ravel
"W-why did... you saved me... aren't we enemies..." Ravel asked
"... My body move on its own and..." he looked at Ravel and said "If I had a power to help the others then why not use them to help... and even if you're my enemy I still want to give you a second chance" Issei smiled at her
Ravel was stunned by what Issei said. Issei then went to help Rias and Ravel didn't stop him but just watch him go
.
.
.
.
Issei kicked Riser but Riser dodged the attack and threw a fire ball at Issei and he countered it with [Fire Bolt] the two attack cancelling each other Issei then use 2% of One For All and suddenly a green spark of electricity was coming out of Issei indicating that he was using Full Cowling... One For All I mean
Issei then dash towards Riser and Issei didn't let Riser use fire magic and Issei sent a punch to Riser's face and he followed it with a roundhouse kick sending Riser away a few feet
"I must admit you are strong probably stronger than the Queen of Rias" Riser said
Issei was pretending all along but he decided to continue it his reason?... why not?
They fought for 3 more hours and Issei loss the fight and Riser threatened Rias that he would kill Issei if Rias didn't agree to marry him but before Rias could say anything
A crying Ravel begged to Riser to spare Issei. Not only Riser but everyone was taken aback by Ravel's action but when Ravel told that she was saved by Issei. Riser let go of Issei which was teleported to the medical room and Rias agreed on the marriage for the sake of her Peerage
-_-_-_-_-_-
Issei open his eyes and sat up and looked around and saw Grayfia entering the room and upon seeing Issei awake she run towards him
Grayfia checked Issei with a clear worry on her eyes but her face was calm one she then looked at Issei's eyes
"How long..." Issei suddenly asked
"3 days... if you want to save Rias-sama you then you need to go now but with you just waking up then-" Grayfia couldn't finish her sentence when Issei stood up
"What are you doing!?"
"Saving the Princess" Issei smiled and Grayfia use her magic to heal Issei and she said something that made Issei smiled
"I Grayfia Lucifuge will forever serve you as my Master... so please come back safely" after saying that she kissed Issei on the lips
Issei kissed Grayfia back after a while they add their tongue. None of them wanted to be dominated by one another but Issei come victorious. They separated and a string of saliva was formed and they both had a blush on their face
Issei smile and he teleport away leaving Grayfia but she quickly create a magic circle and she teleport to the party and wait for Issei to arrived
Grayfia was approached by Sirzechs which is like a older brother to her
"Hello lil sis Grayfia anyway was he going to show up?" asked Sirzechs
"Yes Master would definitely come he promised after all..." Grayfia said and when she saw the look on Sirzechs had she blushed
"Master I see~" Sirzechs teased Grayfia who he considered his little sister
-_-_-_-_-_-
Suddenly the door explode and Issei step out of the dust
"Hey Burnt chicken turkey I am here to challenge you and if I win the engagement between you and Rias Gremory was broken!" Issei yelled and he was smiling
"How dare you mock Riser Phenex!" Riser shouted
"The names Issei Hyoudou remember that Dattebayo!"
"I accept!" Riser said but when he realized what he said it was too late
"Then what do you want as a reward when you win I won't ask Riser Phenex because we all know what his going to ask" Sirzechs said
"I want Rias Gremory to be free" Issei answered which shocked almost everyone
-_-_-_-_-_-
Issei and Riser was on a battle field of some sort and Riser was mocking Issei which Issei ignored but then...
"You're mother must be in shame because of how you are right now..." Riser couldn't finish because he was sent flying. Riser stopped himself and looked at Issei with shock expression
"Stay my Family out of this you little shit!" Issei said anger evident on his voice
'One For All... Full Cowling... 5%' Issei thought to himself and dashed towards Riser. he appeared behind Riser and he sent a kick but Riser dodged but Issei didn't stop there he used [Black Whip] and captured Riser and pulled him towards him closer
He then stopped using Black Whip and jump back to avoid the fire that Riser made. He kept dodging every attack Riser threw at him
Issei then had an idea and he smiled which didn't go unnoticed by Grayfia and Sirzechs
Issei then summoned a bone and fire it at Riser which hit him on the head because Riser was caught off guard but that was enough
"This would break my body but who cares!" Issei yelled. Issei then use Smokescreen and the whole arena was covered in smoke and only Riser was visible because he was flying
Some little explosion sound was heard and Issei come out and Riser threw a fire ball at him but when it hit Issei. Issei just turn into a smoke this confused everyone
Then 7 Issei came out from the smoke and grab Riser and another one came out and delivered an uppercut on Riser
Riser cough and the all 8 Issei poof out and turn into a smoke and from the ground the real Issei there holding a Rasengan on his right hand he appeared behind Riser and slammed the Rasengan on his back
-_-_-_-_-_-
Issei got teleported next to the O.R.C and there they are Rias and the others cheering and Sirzechs walk towards Issei
"You had 2 more wish"
"What?" Issei asked confused
"He Onii-chan knows that you're not part of Rias Peerage" Grayfia whisper to Issei
"Ohhh..." Issei said
"So?" Sirzechs asked again
"I... want the evil pieces got remove from me... I wanted to live like a Human again" Issei said
"B-but Issei..." Rias was cut off by Sona
"What are you planning on?" Sona asked eyeing Issei suspiciously. Grayfia thrn got in front of Issei protectively which surprised almost everyone
"It's just that... I used all of my lifespan to do those things and if the evil pieces were to be removed from me I might regain some of my lifespan" Issei lied
Sona doesn't show it but she was worried and she actually cared about Issei and she had a fault in this because she asked Issei to be part of Rias's peerage and she was feeling guilty and she was very jealous towards Rias and she wish she was Rias right now
"And... for my last wish... please don't ever bother me... I want a normal life..." Issei then pretend to pass out. Grayfia caught him and create a magic circle and was about to teleport to Issei's house but
"Wait Issei is my..." Rias wanted to say something but was stopped by Sona
"He risk his life for your freedom so this is the least you could do... and I'm jealous" Sona muttered the last part to herself but Grayfia heard it
After some time Grayfia pretend to be removing the evil pieces from Issei's body and after that she gave it to Rias and then she teleport to Issei's house with Issei