So I have to ask, with this and the OP being sung in wug, is haiyore that popular? Not that I didn't like it, but aside from all of the references in it, it didn't seem too special to me. Or is it more like, with all of the references to other anime jammed into haiyore, other anime like to reference it?
Japanese consider you a true otaku if you watch stuff like Nyarlko-san. The opening in particular was - and is still - a huge hit in maid cafes and live bars. It's catchy, the lyrics are easy to remember and it's relatively easy to song overall. Also, most studios like to cross-reference their works.
so watching harem = true otaku?
I think you misunderstand what a harem is.