I mean both are good...but (my artist instincts kick out...Art School graduate that I am)
I really like the background of the first one... the gifs somehow are too quick but gifs always make things more interesting. The idea in second one is very good.
I'd like to see softer colours though. And to be honest the poster can only show Ren and no girl... but I really like the fact that you showed the silouette of the girl not the face.
Maybe use this oic and just write the title there:
http://www.myfoodpassion.net/1/post/2012/10/snickersbrownie-med-peantt-karamellsnickersbrownie-with-peanut-caramel.html
or this
http://24.media.tumblr.com/tumblr_mcntfcH4Fi1qhx8hmo1_500.jpg
this is nice
http://24.media.tumblr.com/tumblr_mcns292bYR1rhx87xo1_500.jpg

Maybe Ren with the last one... with somekind of shadow behind him to bring him out from the background so the poster would have the kind of proffessional feeling to it.

You don't have to listen to me... I'm just trying to help *aegyo* *puppy eyes*