Saying "several manga" sounds stupid, regardless of what the correct way of writing it is.
"Holy shit man, you've come along a bit since Uni. I can see more cars that I can count."
"Yeah, I kind of went a bit over the top when I landed my new job at Goldman Sachs. Four Ferraris, three porches, two Toyotas, a Maz-"
"AAAAAARGREGHRHGHGGHHGH FUCKFUCKFUCKFUCKFUCK how could you be so fucking STUPID? The word isn't "Toyotas" it's fucking TOYOTA for the plural because it's GODDAMN JAPANESE WORD!!!! ARRRRRRGGGHHGGHGHHH!!!!!"