Y/n p.o.v

I was in my house watching tv since I did what I promised koko, I trained them so the rest was up to them I still don't like them but they're starting to grow on me, as I was watching tv a red symbol appeared on the floor and a maid stepped out of it  

Y/n(mind) : "ok not the weirdest thing I've seen but its up there" 

Y/n : "who are you?"

??? : "is your name Y/n Kent"

Y/n : "yeah who asking"

Grayfia : "my name is Grayfia and since you help train Rias and her peerage Sirzechs would like to invite you to come to the wedding of Rias Gremory and Riser Phenex"

Y/n : "let me guess Rias and the others fucked it up and lost then Issei being an idiot challenged riser again only to fail now this Sirzechs wants me to come and kick the shit out of Riser and he also wants to see  how powerful I really am because he sent a devil to spy on Rias train but that devil over heard me talking about my powers am I right?"

Grayfia : "yes"

Y/n : *sighs* "fine lets go then"

Timeskip

3nd person p.o.v

After Issei's seconds attempt failed all the devils where in the ballroom, as they were Ravel and the rest of riser peerage were making fun at the fact that they beat Rias and her peerage but also the fact Riser beat the red dragon twice

Kiba : "she's delightful"

Sona : "yes the girl has quite the mouth on her doesn't she"

Kiba : "Sona what's up"

Sona : "the outcome on withstanding I thought it was a good match tho I wouldn't of complained if the end result had been a bit different"

Issei : "I..its all my fault"

Akeno : "Issei no one blames you"

Kiba : "we just didn't have enough exp"

Koneko : "screw those D bags"

just then Riser appears in a burst of flame

Riser : "greetings the renewed devils of the underworld of behave of the Phenex family Riser would like to thank each and everyone of you for coming today this is an historic moment of the world of devils and I want our dear guests to be the first to know to great dynasty's are about to become one Lord Riser of the distinguished house of phenex shall wed Lady Rias of the illustrious house of Gremory and now I present to you my bride...Rias Gremory"

as Rias appeared everyone looked in awe apart from Issei 

Issei(mind) : "Rais I'm sorry"

just then a guard was sent flying through the doors and slid across the ground, then a voice spoke up

Y/n : "you idiots had 1 job and you still couldn't do that properly"

Rias, Sona and Rias's peerage : "Y/n?!?!" 

Y/n : "yeah hello idiots"

Riser : "what is the meaning of this"

Y/n : "sorry but if Gremory says she's not going to marry you then that means no"

Ravel : "this is human crazy"

Riser : "get him"

as the guards ran at Y/n he just stood there smiling

Y/n : "do you really think that will work on me"

in the blink of an eye all the guards were sent flying backwards with a fist mark imbedded on their chest plate 

Riser : "what is the meaning of this"

Sirzechs : "its just a little entertainment I prepared"

Issei : "who's that"

Rias : "my brothers here?"

Issei : "that guys your brother

(R/d = Random Devil)

R/d : "its the great devil lucifer"

Issei : "wow he looks hardcore"

Riser : "what exactly do you mean by entertainment" 

sirzechs : " I watched the game Riser and honestly I was underwhelmed by you my sister lacks game exp yet against your considerably larger forces she nearly had you beat"

Riser : "its the final result that counts my lord"

Sirzechs : " in the past the games don't mean what they use to besides riser you were nearly brought to your knees by a first time competitor I cant imagen your family's proud of the way you preformed  I think you should begiving anther chance"

Y/n : "so you must be Sirzechs"

he turned to Y/n

Sirzechs : "yes and you must be Y/n I have heard many great things about you"

Y/n : "so you brought me here to fight him"

Riser : "a human fight me that's a joke right you wouldn't be able to defeat one of my peerage members let alone me"

Y/n : "oh I get it turns out the phenex family are chickens"

Riser : "what did you say you human trash...very well I'll make your death a painful one"

Timeskip 

as Y/n and Riser were standing on the battle field the rest of the devils watched unaware about what's about to happen, when the match started 

Riser : "when riser is done with you he will go and clam his.."

before he could finish his eyes widen as he seen Y/n right in front of him with a smirk on his face 

Y/n : "checkmate"

when Y/n punched him it sent Riser straight into the wall, the devils couldn't believe what they just saw one second he was across the field next he punch Riser into the wall, this caught 2 peoples attention 1 of them was Sairaorg Bael the next hair to the Beal clan he is known to be a battle manic looking for strong enough opponents at first when Y/n burst into the hall he thought that Y/n was a human but had respect for him to stand up to bullies but when he saw this he could believe his eyes

Sairaorg : "Regulus did you just see that"

Regulus : "yes I cant believe it ether I didn't know humans were capable of such feats"

Sairaorg : "tell me can you sense magic from him"

Regulus : " no nothing not even a little bit of magic"

Sairaorg : "what was the boys name again"

Regulus : "Y/n Kent I believe he was called"

Sairaorg : "Y/n Kent I want to fight you"

as he grow and grin and got existed about fighting Y/n to see just how strong this human really is, as he was thinking this someone else was thinking about Y/n and that was the red dragon Ddraig

Ddraig(mind) : "I've lived longer than I want to remember and I thought I saw everything but this, this is something else I have never met a human with this kind of power first he crushed the boosted gear and now this display of speed and strength I remember him saying he was a Kryptonian and talking about his powers when he was training Issei I this the power of a Kryptonian if so then I have one thing to say...WHY DO I HAVE A PERVERT AS MY PARTNER AND NOT Y/N"

As the fight was coming to a close Riser was on the ground covered in his own blood, while Y/n looked like he hadn't even started yet  

Y/n : "well Riser its been fun and all but there's something I Should tell you"

Y/n picked him up by the neck and made him look at him

Y/n : "not so tough when someone stronger than you come along are you"

Riser : "p..please I..I give up"

Y/n then dropped him and they were teleported back to the hall where the devils, as the devils were talking to them self's sirzechs 

Sirzechs : "on behalf of the devils I think we can all agree that that was a great display of power and now you have won the right to marry Rias"

this shocked everyone but before anyone could say anything Y/n grabbed sirzechs by the neck and lifted him off the ground 

Y/n : "if you think for 1 second that I'd marry into a family who puts their name before they own flesh and blood then you really are stupid"

he then turned to face everyone while still holding Sirzechs

Y/n : "if you devils think I'm some sort of prize then your dumper than I thought lets make one thing clear I don't belong to anyone if you need a reminder I'll happy knock it into you understand"

they all nod and Y/n lets Sirzechs go and then he is teleported home

Y/n p.o.v

Y/n(mind) : "those dam devils *sighs* maybe a nap will help me and my devil headache"

I then headed to bed not giving a dam about anything, as I let sleep take over me I couldn't hlp but think what my dad said

Y/n(mind) : "live a normal life...yeah right"