Boogiepop wa Warawanai, Narutaru: Mukuro Naru Hoshi Tama Taru Ko Recommendations
Both BoogiePop Phantom and Narutaru are fairly unique and interesting series. I can't really explain why without ruining one or the other, I will just say that if you liked all the messed up stuff in it, you will definately like the other one. Strange occurances and an overall interesting conclusion.
The main similarity in these two titles are the skull numbing nearly non-sensicle plots. If you enjoy not knowing what is going on most of the time and yet still managing to be entertained then Narutaru or Boogiepop Phantom will suit you well.