You : So do you have kakao ID?
minsuga : Yeah. Add me 'minsuga'
You : Sure, I need to go. I'll add you later, minsuga ;)
minsuga : Bye

So that's how we ended our conversation. It's an online chat, and we just talked for less than 30 minutes. 
You know how people warn you not to trust stranger? How they can, maybe, do something unexpectedly to you. But here I am, typing his username and thinking about adding him or not.

'Add him.... no. We just met! But... Should I give it a try?' I'm thinking really hard until.

Add as a friend.

'Yup. There it goes'

And from here, my story begins.