Hi I'm kath28n_n. 

According to urban dictionary (my lifesaver in this contemporary era of internet slang and fancy emoticons), n_n is the antonym of u_u which means sleeping, so really, n_n is just my obnoxious way of saying I'm awake and happy. 

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If you like poetry and philosophical stuff, or just wanna read more of my writing, here's my blog: http://intotheforgotten.wordpress.com/

My Facebook page, if you're interested in that sort thing: https://www.facebook.com/katho28