My sister's ex (Taehyung)

                                    

                                          
A/n - I don't know how tinder works
                          
Y/n POV
                          
Third wheeling is my lifestyle. I have always third wheeled my sister with her boyfriends since I was 8 years old and she was 16. Even when she is married now I can't help but continue to third wheel instead of me going on dates myself, fuck me! I'm 18 and never been on a date. I have had school relationships but never been on an actual relationship or date. Dating for less than a month and meeting only in school doesn't count as relationship.
                          
I installed tinder in hopes of finally finding a real boyfriend. But to my disappointment none of my matches are clicking. As I kept on swiping right and left I saw a familiar face. I clicked on his profile as I looked through his pictures.
                          
Oh! He is my sister's first boyfriend. He looks so different now, back then he was just a teenager. He got buffer and prettier, he was a typical flower boy when he was in highschool. I used to crush on him, old days. I go back to the main screen after looking at his profile for a while. I was about to swipe left but I got mixed up with directions and swiped right instead.
                          
I scream in horror, oh no, no, no, no! Shit what do I do?? I throw my phone and facepalm. I hope he doesn't recognise me and swipes left.
                          
After a week
                          
I relax as a week has passed by, I think he swiped me left. But oh I was wrong. My phone had a notification that I was not expecting. Kim Taehyung and I are a match!?! 
                          
I grip my hair in frustration. Why did he swipe right? I saw a message from him. It said 'Hi lol didn't expect us to be a match'
                          
Me too bitch. 
                          
Does he know me? If he doesn't why would he say it? I mean he can recognise me if he puts a lil effort, I agree I'm hard to recognise for someone who last saw me when I was 9years old. 
                          
I decided to reply safe with 'me too lol' and then I sat on bed anxiously. How do I say that I'm his ex's baby sister. Or maybe he knows but that is so weird. 
                          
Taehyung
So are you in college or highschool? 
                          
Me
College 
What about you? What do u do?
                          
Taehyung 
I work as an model
Guess you didn't go through my profile yet
That's okay tho :) it means we have more to talk about.
                          
Me
Oh yeah haha I didn't. I'm assuming you went through mine?
                          
I lied. I went through his profile but I forgot cause I didn't think it's important to remember details about him.
                          
Taehyung
Yeah 
you're really pretty :)
                          
Me
Thanks I guess
Btw do you recognise me?
                          
I thought this is the best time to bring this up before it escalates.
                          
Taehyung
I know you?  
                          
Me
Do you remember Shin Aerum?
                          
Taehyung 
How do you know her?
                          
Me
I'm her sister
                          
Taehyung
WAIT
YOU ARE THAT Y/N?