I have definitely seen those poses before, and I'm confident there's a tag for this meme here. I don't remember what it's called at all though, and I can't find it...

It appears that the Raven at the top left corner may be a reference to this... manga?

BIOnie said:

It appears that the Raven at the top left corner may be a reference to this... manga?

Yes. The whole page is Haou Airen references.