Responses
Well according to wikipedia it's a thing in South Africa, so she was probably from somewhere around there. You really shouldn't be using manga to research this, though. Japanese culture is very hands-off with greetings, so a lot of western greetings, like the english hugging people their close to, get exaggerated to things like mouth-kisses.
So basically this one time, I was meeting with this girl who was a foreigner and like she really did kiss me on the lips to greet me ( like a peck) . It was only for a second after hugging me. So, I just assumed it's something foreigners do. BUT FROM ALL THESE MANGA'S EVERYONE IS SAYING IT'S NOT?? Anyone out there where they actually do this in their culture? Σ(  ̄□ ̄||)