He's Kim Taehyung, your online friend. You lived in France but he was in South Korea. He saw one of your posts on ig and sent you a message and that's how you became close.

You always wanted to meet each other, but the right conditions never came. One day you went to a cafe. You sat down and started to drink your drink and work on your phone, but you saw a notification from Taehyung texting “look behind you” When you look back, it was him..!

"I finally got to meet you, huh?"