Fate series  is owned by Type - Moon

Author p.o.v
You are a normal person as you are kind and a caring person that have summoned a servant from your childhood days that is rider aka medusa that you and her were not much talkative at first but soon day by day their bond grow as you have a crush on her even though that medusa already have a long time crush on you that her loyal to you she will kill anyone for you.

You are in your friend household while talking to others

Y/n: mmm this is some day huh.

Shirou: tell me about it i mean its been a while since we talked

Y/n: yeah.

Shirou: but i have to ask does rider have to be here?

Shirou nervous sweats as looking at rider as she sits close to you

Medusa: why do you have a problem...you think i am not for suitable for master needs?....

She said in cold and a bit of yandere tone that you and shirou nervous sweat

Y/n: um rider san please calm yourself please

medusa: yes master i apologize.

Y/n: its ok

you smile at her that makes her blush a bit but hides it

Shirou:so..may i ask ..you and rider are childhood friends?

Y/n: yeah we are i mean she's with me since i was a child

Shirou: oh

Medusa: master can we head back....i don't feel comfy with him asking like this...

Y/n: ahh yeah ...she is insecured a bit

Shirou: oh ok

You smile and gets up as leaving shirou house as getting back home while you look at medusa

Y/n: medusa chan you don't need to worry shirou is a nice person

Medusa: b-but master y/n he ask a lot and i don't want him to know..just what if ...he will tell other girls and then they will take you away..

You smile and holds her hand

Y/n: no matter what happens i will never leave you

She blushes more that you walk with her back to your home

Y/n: medusa san when we get home can we watch tv on the sofa together like always

Medusa: yes we can master you and snuggle onto me

Y/n: alright medusa san

You smile even more that suddenly she felt someone that she did'nt like to that you look at her

Y/n: medusa what's wrong?

Medusa: master...someone is here...with bad presense....

Y/n: like whooooo

You being cutted off as medusa looks at you being pulled away

Medusa: master!!!

She ran towards you to save you as see she someone that she hates

Medusa: you!!!

She looks at the person that took you away with her shroud that bind you so fast

???: hello rider..

Medusa: you took my master...how dare..you..

???: well he shall be vanquish ..i sense daemons in him

Y/n: mmmph?!

You still struggle as rider is pissed off

Medusa: my master is not a daemon....he is a wonderful human...you useless worthless exorcist caren....

Caren: you will fall with him.... black serpant...

Rider did'nt say anything as she throws her dagger towards to caren as it hits a ledge

Caren: hah! You miss..you called yourself a serpant?!

Caren did'nt know rider use the dagger to pull the ledge that causes the ledge being pulled as caren fall down making you fell with her

Medusa: master...

She went towards you and release you from caren shroud of magdalene

Y/n: ahh..ah..

Medusa: are you alright master?

Y/n: y-yeah.

She slowly put you down as grabbing her dagger and walked towards to caren who is a injured on her legs from the fall

Caren: no..no,,

Medusa: you hurt my master...try to kidnapped him....no..one..takes...my...master....

She smirks making a yandere smile and swiftly kills her that slashes her neck

Medusa: my y/n....my love...

She look at herself that she is covered in blood and walk to you

Y/n: medusa..is..

Medusa: yes..she is dead...

you hug her as she blushes even more that carrys you walking back home.

Timeline skip

After a nice shower that you are on the couch watching tv while rider getting out from the shower and change into new clothes.

She sits next to you as hugging you closely

Medusa: are you ok master?

Y/n: mhm i am..

You blush as looking at her that she is a bit confuse

Medusa: y/n?

Y/n: m-medusa i need to tell you something

Medusa: yes?

Y/n: i know we have met a long time and i know this all sudden but i want to confess my feelings to you that ..i have a crush on you that i want us to be more..as in lovers

She blushes instantly that she looks at you

Medusa: really?

Y/n: yeah and to give you thanks for saving me.

You slowly kisses her on the lips that she smiles and kisses you back as she been waiting for so long for you to kiss her and love her.

She kisses you more passionately that you kisses her back. As they both kiss for few seconds and went apart

Medusa: y/n...i have been waiting for so long for you to said that

Y/n: i am sorry i was scared that you might reject me..

Medusa: i will never reject you my y/n~

She hugs you even closer as a yandere

Medusa: my y/n~ forever i love you

Y/n: i love you too

You snuggles her as she holds you even more while watching tv that you did'nt notice as she makes a yandere smile

Medusa mind: my y/n kun~ my master~ forever till the end of time~~ i will always love you and never...let any girl..have you.....always be mine..~

Author note
Hey waddup guys its me here i hope you all enjoy this chapter more than i do and also this request i have an awesome help from this awesome bro Astaroth-Origin he help me out in this chapter go check him out he is so cool so yeah i think that's it for today and i will see you guys later peace out.