The girl was blonde, had long hair and was rather feminine I think, and the guy had dark hair.
I remember that the guy touched the girls thigh/breast and was surprised that it was so soft. And it turned out that the girl was a lesbian and the guy was gay and there was an akward sex scene because they felt they had to 'continue the human race' but they weren't attracted to each other. One of the stories started by two strangers: a man and a woman having a bad day sitting in a bar, and they were talking together, when suddenly something happened and when they walked out, there were no people around (or dead bodies)? It was either a pandemic or a bombing or something like that, and they were all alone in the city. I believe it was a short story collection. It was a manga I read in about 2010-2012 and I bought it in Poland (translated to Polish) but I'm pretty sure it was originally Japanese. Edit: It's Beautiful People by Mitsukazu Mihara!
