You mean Shorter. Haha, well, as I said, I don't know Banana Fish so well, and maybe, I missed something important in the second volume I could not find in the comic store.

Oh, yes, it totally did. But it's not one of the discrimination cliché.
It's true it's not a discrimination cliché. However, I think that the mangaka sort of takes all sort of narrative clichés, be they desciminative or not, and applies them heavily for the dramatic effect and, maybe, a sort of meta-referential humour.