A/n's pov
Y/n opened her eyes while being hung on the ceiling.
Y/n: What the---?
???: Are you awake?
Y/n: What do you want from me?
???: I want you to tell me the big secret of BTS, or your brothers.
Y/n: *gritting her teeth* Never.
???: Well then...What if I tell you that I caught your sisters as well?
Y/n: What?
Then, Y/n heard Jennie's shout.
Jennie: Leave Y/n alone!
Y/n: Jennie unnie---?
???: Do you believe me now?
Y/n struggled as she heard Jennie's screams.
Y/n: Why can't everyone leave me alone---?
Then all of sudden, the rope was around Y/n's neck.
???: If you die, I'll let Jennie go. How about it?
Clearly [???] expected that Y/n will tell everything in fear. But Y/n wasn't saying anything even though she was sobbing. [???] smirked then tapped on the table in front. The rope was tightened and Y/n started to shake as she struggled to breathe.
???: do you still want to die?
Y/n: *chokes*
But when Y/n didn't answer, [???] continued to tap on the table. Y/n's face started to get white. She coughed blood out while being choked.
Y/n: I-I w-i-ll tell--*cough*
???: You're a good girl.
When the rope disappear and Y/n fell, y/n breathed in and out hard for a minute and stepped towards [???]
Y/n: Their biggest secret is...
???: Yes?
Y/n got closer to him and [???] was looking at Y/n with excited eyes. What happened next just happened in one second.
Y/n took out the small syringe and injected the liquid inside it to [???]. But when [???] didn't lose consciousness after it, Y/n was to another syringe with yellow liquid in it and injected into [???]
This time, [???]'s body started to shake after Y/n injected the liquid.
Y/n: Do you know what this is? The one I injected into you first was peroxide. Then, the second one I injected into you was vinegar. When these two liquids mix, it creates peracetic/ peroxyacetic acid.
???: Hehehe...But you know...you are dying with me.
Y/n: What?
???: This room was being filled with Carbon dioxide...You're still going to die even though you get out now.
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Mafia Stepbrothersㅣ BTS Fanfiction
Fanfiction[BTS Fanfication]&[BTS x Reader} Choi Y/n is 15 years 15-year-old teenage girl who is intelligent. Her life was peaceful and perfectly fine, until...her mom decides to marry her boyfriend and Choi Y/n meets one of the most dangerous mafias in the w...