Y/n p.o.v

It was the next day and I couldn't wait to see Shirone again but I don't know why she changed it to Koneko I like it the way it was but if that's what she wanted then oh well, As I walked in the gate I saw Koneko standing with the group of devils as I walked past them Shirone smiled at me and I smiled back, just then the perverted trio as the girls called them came to me

Issei : "hey Y/n what's the big idea"

Y/n : "um what?"

Motohama : "you had lunch with this schools mascot yesterday"

Y/n : "yeahh???"

just then Issei 2 friends ran at me trying to punch me I dodged both of them as they just swung wildly at me, as this was going on Issei then helped his 2 friends as I was dodging they idiots I just sighed as I was starting to get bored of them as I was about to fight back something knocked the perverts friends out cold, I was looking at them confused as to what knocked them out, when I looked up I saw Koneko punching Issei in the gut

Issei : "ko...ne..ko...why"

Koneko : "leave him alone pervert"

when she took her first away Issei held his gut and fell on the floor in pain, while she walked over to me

Koneko : "hey are...you ok"

Y/n : "you know I could of handed those idiots right"

Koneko : "I know I just..."

just then I smirked

Y/n : "oh I understand now"

Koneko : "you do?"

Y/n : "you wanted to be a hero to get a hero's reward right"

just then I kissed her forehead and when I did the group of devils looked shocked

Y/n(whispers) : "there you go...hero"

I then walked away laughing a little bit 

3rd person

After Y/n Kissed Koneko's forehead she turned bright red and fainted 

as Koneko was on the group with a bright red face Rias and the rest of her group walked over to her smiling

Akeno : "hehe looks like Koneko has met her match"

Rias : "yes it would seem that why"

just then they hear Sona

Sona : "what happened here"

Rias then tells her about Issei and his friends trying to fight Y/n but Koneko stopping them, just then Sona see Koneko on the ground

Sona : "so what happened to Koneko"

Rias : "lets just say she was rewarded for helping Y/n"

Timeskip

After school the devils were in the ORC they were talking about a stray that had to be killed so they left, but when they got there they saw something that made them all pale all apart from Koneko who was smiling, because in front of them was every factions nightmare, standing there was a man in red armour and in his hand he held a shotgun all while the corpse of the stray laid at his feet, this was 1 of the hell walkers to say the devils were scared was a understatement they were terrified, just then the hell walker started to speak

Hell Walker(Y/n) : "Rias Gremory"

this both shocked and scared Rias the fact he knows her name must not be a good thing

Rias : "y..yes Hell Walker"

Hell Walker(Y/n) : "I know that you have something that belongs to me"

Rias : "w..what would that be"

the hell walker turned around and pointed at Koneko

Hell Walker(Y/n) : "her"

Rias : "y..you mean Koneko"

Hell Walker(Y/n) : "yes she belongs to me Gremory"

Rias and the other turned to her

Rias : "I..is this true"

Koneko then showed them the mark on her and their eyes widen, Koneko then made her way to the hell walker and hugged him, the hell walker just petted her head and walked in front of Rias who was shaking like mad right now

Hell Walker(Y/n) : "Gremory I want you to listen and listen well understand"

she nods in fear that she'll say something to piss him off

Hell Walker(Y/n) : "I will let her stay with you and your...group but I warn you if she gets hurt because of anyone"

The hell walker pointed the shotgun to Rias head

Hell Walker(Y/n) : "I will hold you responsible"

he then pulled the trigger but shot hit the wall behind them destroying it completely

Hell Walker(Y/n) : "do you understand"

Rias :"y..yes hell walker"

The hell walker put the shotgun away and left the group of devils

Koneko p.o.v

we were in the ORC after Y/n scared the shit out of Rias and the others and now they wanted some answers

Rias : "Koneko how long have you had that mark"

Koneko : "I've had it before I was put in your peerage"

Issei : "hey Prez what does it mean anyway"

Rias : "it means that Koneko belongs to the  hell walkers so if anyone touchs her they would answer to the hell walkers"

just then Issei grow a smirk

Issei : "I wonder who the hell walker would react when he finds out about Y/n"

Rias : "he wont do anything"

this shocked Issei 

Issei : "what"

Akeno : "Issei Y/n's a human and the hell walkers don't harm humans"

After they asked more questions we all went home, when I got home I walked in to see Y/n coming out the shower wearing a towel

Koneko : "Y...Y/n what are you doing here"

Y/n : "oh hey Kitten"

Koneko : "p..put some cloths on"

Y/n : "why you've seen me naked before"

Koneko : "that's when I was younger"

  Y/n : "ok fine"

I then saw Y/n put some trousers on and sit on my couch, I then walked by him only for him to grab me and sit me beside him, when he did he warped his arm around me and pulled me close to him, for the first time in a while I felt happy and safe I then put my head on his chest

Koneko : "Y/n why did you have to tell Rias and the others that I'm yours"

Y/n : "sorry about that you know how much you mean to me right I just didn't want you getting hurt that's all"

I then decided to get him back for the teasing  

Koneko : "so the great Satan Slayer has soft spot how cute"

Y/n : "oh you want to play do you"

just then he tackles me and started tickling me

Koneko : "hahah...no..hahaha...stop"

Y/n : "stop it but it sounds like your enjoying your self"

after a few seconds he stop's and looks at me 

Y/n p.o.v

Y/n : "hey Kitten it getting late so I better be going now "

when I tried getting up I felt Koneko wrap her arms around my neck

Y/n : "Kitten what are you do.."

just then she cut me off by kissing me, her lips felt so soft yet warm I didn't know why but I like it being a demon slayer you don't get this kind of thing but it made me feel warm, after a few seconds she stopped and looked at me

Y/n : "K..Kitten what was that for"

Koneko : "I..I'm sorry I just...I've always "

I cut her off by kissing her I felt her stiffen up a bit before relaxing into it, after a bit I stopped and looked at her again

Y/n : "dam I owe the old man 50 now"

Koneko : "why"

Y/n : "he always told me you had a crush on me but I never believed him, he bet 50 that you did and I just lost didn't I"

just then Koneko started giggling

Koneko : "yes..yes you did"

she then looked at me smiling

Koneko : "I love you Y/n"

I couldn't help but smile back at her

Y/n : "I love you to kitten"

we kissed 1 more time before we headed to bed I was sitting on the bed when Shirone walked in from the bathroom 

my eyes widen 

Koneko : "h.how do I look"

Y/n : "Shirone what I'm about to say you'll never hear me say it again"

Koneko : "w..whats that"

Y/n : "Im glad to old man was right"

Koneko then started giggling and made her way to me and laid beside me looking at me

Koneko : "goodnight Y/n I love you"

as she fell asleep I couldn't hep but smile

Y/n : "I love you to Shirone"