Whoo?? From my point of view:
It's either arin or that ninja girl... the camera girl is impossible the two who hangs out together.. while the tall is impossible, but the short one could be, the dream girl is impossible too and the missing one can't too.
But i will explain arata's relation with lilith... personally i doubt these two will come together... i only see both of them as a manzai comedy/comedy duo, i still hasnt see a romance budding between the two of them. Strange, even though lilith is the first girl arata met. But i wish he didnt end up with lilith. Because like i say, their relation is unique, i can only see them as friends and comedy duo and nothing more.