My Only Grell ~Grell X Yandere Reader~

His lover,the demon hound

~Third pov.~
The shadow figure turn to see you holding your weapon as you are upset about your prey.The figure's eyes stare wide at first before he start running away from you.
~your pov.~
"Hey,wait!",I said as I start chasing after it.I can't believe that I was too late to kill him for hurting my Grell.
~Flashback before the accident happened~
We were at his office,you know doing this business,which it was so boring."My.My.Who is she?",he asked as he pointing at me.I can tell that he's already fallen for me."This is Lady (y/n),Barrymore.",Ciel answered before he smirked at me with a kissed of my hand.Yuck!What a dirty man,he is!"Is nice too meet you",he said with a smiled on his face.I faked smiled him back while trying not to throw up at him.Though,I don't mind at all.He step back turn toward Grell and asked,"and who is that bloody rat of your?"
I gasped when I heard what he said to my Grell.I grab Grell's arms as I wrapped around him and said,"oh,this is Grell,my lovely fiancé."I smiled at him as he was shocked to see me with him."Oh,I'm sorry for saying that sir",he continued as he turned toward me,"and sorry for that too."I knew that he lying for that part.Sure,I'll just let it slide right now,but he will get his punishment for talking dirty about my Grell!
~Flashback ended~
So that's why I end up chasing this shadow figure who just killed my prey."Wait!",I continue before it got away,"I was about to thank you!Gosh!"
"Oh well",i sigh before i went back to my bedroom.
~Mey-Ren pov.~
"Huh?What was that?",I ask myself as I get off from my bed.I heard something coming from the hallway.So I grab the candle and start following the sound.
Each time I go,the noise got lo under and closer than they appear.I try not to wake up the others as I was walking.Before I continued,the shadow figure bet me too it as I scream.I felt something warm as it cover my mouth.
"Mey-Ren,it's me (y/n)",she said as I look up with a relieve sigh."You scare me (y/n),oh yes you did",I nodded myself.(Y/n) apologize me for scaring her.She said that she was getting a drink since she was thirsty.
"Now come on,Mey-Ren.Let's go to bed before-",she was interrupt when we heard a giggle.We gasp and turn as we follow the giggle...
~Finny pov.~
"Ah~",I sigh happily as I walking back to my bedroom.Today was a happy day...well,beside the poor dog dying...
Anyways,as I was about to go back to my bedroom,I stop and saw Mey-Ren and (y/n) walking toward me."Mey-Ren?(Y/n)?What are you doing?",I ask before they shut me and said,"listen."
I start to listen and heard a giggle coming from Angela's room.We nodded and start going where Angela's room is.
When we got there,we open a little bit to the door and gasp as I felt a pain inside of me.
~your pov.~
That little slut.I knew she's one of those girls.I turn toward Finny and saw his broken heart.He turn around and start running away before Mey-Ren went after him.I look back with a disgusting face before closing the door.

                             ~💀~

"Ahhh!",I opened my eyes quick ran out of the door.I follow it as it lend me to that same place that happened last night.
I fake gasp when I see Barrymore's body."What the bloody hell is going on!?",Ciel said as he and the rest of others came when they heard Mey-Ren's scream.
"I-It was awful,oh yes it is",she nodded as she point at Barrymore's body.They gasp,"I thought this case was solved,but pearly I was wrong",Sebastian sigh as he look at Ciel."What are we gonna do!?And-Where's Finny?",Bard ask as he try to calm down.
I look at Mey-Ren as she knew where he is.I gasp as I forgot someone.I start running back to the mansion.
~Grell pov.~
I can't believe that she just left me!Huff!What a woman,she is~I was at the bed,waiting for her to come back to the room just to unlock this stupid handcuffs.
I sigh as I look around.'I'll never gonna escape from her...'Bang!I look up and saw (y/n) at the door."I'm so sorry,honey.",she continue as she warp around my waist,"I was too distracted that I haven't even respected my own love."
And with that,I rub her back while I told her sweet things.She look up and smile.I smile back as she let go of me and start to unlock the handcuff.Before she say something,we heard a door open and saw Ciel with Sebastian.
~your pov.~
"I knew it was you",Ciel said pointing at me."What are you talking about?" "Don't play dumb at me!We all know that you killed Barrymore!"Oh...he was talking about that...
"But,I didn't do it!I was with Mey-Ren!" "Lies!" "It's true",we all turn and saw Mey-Ren,"s-she was with me,oh yes she did",she said.'I'm glad that i bumped into her'
I look at Ciel and Sebastian,hopefully they believe her."Beside,w-why would she want to kill Barrymore?"
'*Sigh*why did you asked,Mey-Ren?' "Because Mey-Ren...",Ciel continue as he point at me,"I remembered the way that (y/n) looked at him.She looked at him with her hateful eyes like you wanna suffer him until his body was out cold.Am I right,Lady (y/n)?"
My eyes were about to go wide,but I shake it off and just smirk at him."That is the ridiculous thing that I ever heard,Ciel.And beside",I cross my arm,"what prove do you have?"
I could tell that Ciel was trying to hold his anger out while Sebastian seen to enjoy this.Before I turn away,we heard a scream.
~Ciel pov.~
"What was that?",Grell asked as we were continued following the scream."I don't know,but I feel like this should be interesting",(y/n) replied as we heard the scream closer.
I don't know what going on.I thought (y/n) was the one who was be hide Barrymore's death.But I guess not.
Anyways,when we made it,we gasp as we saw Finny pointing."It's the demon hound!"
"A demon hound?!?!Oh~How exciting!",Grell said as he had a bloody nose.I look at him with a disgust."Really,instead of being shock,you decided to be exciting?",I ask him.He just struggle before (y/n) start running towards the demon hound.
Before she pull out her swords and about to attack it,Sebastian quickly pull her away.She turns to attack him,but she's stop herself just in time.
"Now Lady (y/n),I know you want to do your way,but you have to plan it before you do it.Now then",he continue as he let go (y/n),"let me show you how it's done."
~your pov.~
Sebastian started to run toward the Demon dog as my hair flow his way.I can't believe that I let Sebastian do his way instead of my way.Well,good thing that Undertaker is not here.
Anyway,when Sebastian got there,he pull out a-dog biscuit?!?!
"Now.Now.This is how you do it",he continue as he pull out one of the biscuit,"first,a treat!"The Demon hound notices Sebastian as his eyes started to turn into a heart."Here you go",he said when he feed him.
"And now the punishment!",and with that he hit him."Second,a pat",he start patting the demon hound."Punishment!",he said as he hit the demon hound again."Then finally,a big hug",and with that,he started running toward the demon hound to give him a big hug which cause Sebastian to hold him while carrying him up in the sky until falling into the ground.
We cough as we're trying to see what just happen.We gasp when we saw a big hole."Where's Sebastian?",Finny ask as he look around until he whisper while crying,"no...no...it can be...it can be!"
Everybody start to cry except Ciel and me.I start to smile as I hear those angels singing out of nowhere.'Yes.Yes.YES!'
Finally,no Sebastian!Then that's mean nobody getting my way to be with Grell.I mean,sure I'm not happy that Grell is crying for that dirty demon,but I don't care because he's gone!Yay!
"Sebastian,come out of there!I don't wanna deal with these idiots!",Ciel yelled before we say a black figure jump up and got down to the ground.
'No...don't tell me it's-'"Bassy~!",Grell said as he ran to him to give him a hug before he got hit to the ground."Sebastian!",everybody cried of happiness.'No...I was this close!Why is the world so curl to me!'And with that,I went to my dark side.
"Um,(y/n)...are you okay?",Finny ask.I turn around and try my best to give him a smile,"no.Everything is alright,Finny."He smile back at me before turning back at Sebastian.
I look at Sebastian while my hand touch my skin until it can reach my bones.'Oh,I will get you for this,Sebastian'

~💀~

After everybody celebrated Sebastian,we finally know who killed Lord Barrymore and that was a demon hound name Pluto.Fortunately,Angela exampled everything about Pluto.Of course,I thank Pluto,in secretly,about killing Lord Barrymore for me.
"Well,I guess Pluto like Sebastian and (y/n)",Angela giggle as she saw me petting Pluto while Pluto try to hug Sebastian's leg which Sebastian didn't look please.'That's a good boy,Pluto'
"Lord Phantomhive,you don't mind if Pluto could stay with you.After all,I don't want him to get in danger",Angela ask."Sorry,Lady Angela.Unfortunately,we can-"
"Yes,Lady Angela.I'll be delighted to take Pluto to my mansion",Ciel said with a smile on his face.Well,I think that's a smile,right?
Anyways,the others smile and nodded as a agreement while I evilly smile as I try not to laugh.'Suck on you,Sebastian.Suck on you'

                               ~💀~

"Here we go",Angela said as she put a collar on Pluto,"don't forget me,Pluto."Pluto smile and bark happily while Angela giggle.Finny walk toward Angela and said,"w-well,t-this is it.This is a good bye."Angela smile as she kiss Finny check,"don't worry,this isn't a good bye.We will met again soon,mr.Finny."
And with that,Finny blush and start getting on the carriage as we start waving at her after we started moving away from her.I look at Grell as Grell look at me with a smile on his face.
I sigh happily as I thought that everything should be alright.