My dear teacher ( YANDERE sana X reader)

Afterparty

Nayeon "Wait I guess tomorrow is y/n's birthday"

Jeongyeon "No stupid bunny, it's next month "

Nayeon " But I thought -"

Jeongyeon  "It's next month nayeon, chill, wait that's your favourite song right? go ahead I'll join you"

Jeongyeon led Nayeon to the dance floor before retreating to a quiet corner of the house. even though it was getting late, the party was still strong and filled with energetic young adults. 

Jeongyeon " hello, Miss mina?"

Jeongyeon "Sorry the party is too loud, but don't worry nayeon won't be home tomorrow, I assure you"

Mina "Hmm good job, I'll credit the money after tomorrow but make sure she doesn't come around y/n, ok?"

Jeongyeon "Sure don't worry"

*End the call.*

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I was about to close my door, but sana suddenly held my hand, I got scared for a second as she came out of nowhere. " oh god sana, you scared the shit out of me", She chuckled and walked her way inside my apartment.

Sana " Well nayeon is still not home it seems, so I thought I could give you some company"

Well, she's right. I didn't want to sleep alone tonight. Plus, she wouldn't cause me any harm, I suppose. She jumped on my bed.

y/n " You could at least change your dress"

I said that while myself, jumping onto the other bed in the same cloth, and she gave me that death stare as if I had done something wrong. She wanted me to sleep with her. She jumped to the bed I was sleeping on. She should try being an athlete.

y/n " AAAAH my back get off"

Sana " Ohww I landed right on the spot" 

We laughed and she snuggled with me,  I was completely immersed in her arms, She smiled and told me she missed me a lot, I was hesitant at first but slowly I hugged her aswell, It felt warm and nice, I didn't want to move an inch.

Sana " I know you missed me too"

y/n " Sana since you left my life became a living hell, you know that right?"

Sana " I lied to you y/n "

y/n " what lie?"

Sana looks away " I completed my degree a long while ago, The company I was working for wanted me to travel away, so I lied to you"

y/n " w..what company"

Sana "We kill people y/n, I became a teacher cause I had to do some kills in that area, and then I met you there"

y/n "So you just came there to kill people?"

Sana nods her head, "Don't you worry y/n, I don't kill anymore, now I only assist in torturing "

y/n " I thought you would become a better person, I was wrong, You can never change sana," I said with a cold tone, As I tried to get up from that bed, she stopped me by tightening the hug.

Sana " I will stop from now on y/n,  please stay y/n " She was crying, begging me to stay with her, The last time she cried she left me for a long time, and now she is crying for me to stay?, who knows she will go away again. I wiped tears off her face, I never liked watching her cry, I could still bear her beating the shit out of me, but seeing her whimpering and crying like this, I felt really bad.