I like how the two faces at the end portray an age gap between men and women. Guys happy as fuck, girl looks concerned.
Huh? I don't see happy af from looking at that face. They both have a sweat drop on their face, and earlier when the age was mentioned, dude was shocked af (girl not as much as him). Dude thought she was older, she thought he was younger. I imagine his face is more of the, "Haha, I think I fucked up" kind of face. I can't really say if the girl is concerned but she's blushing in that last panel, so it's probably not a bad type of concern.