I've been reading this for a while now, but I was very surprised when I realized there was no thread for it. This is my third favorite currently running manga behind OP and Beelzebub. Contrary to what the title may make you believe, this is a seinen, not a shoujo.
http://www.mangaupdates.com/series.html?id=4111
As for the series:
! It got a bit slow between arcs for a couple chapters, but the intensity is really starting to pick up again with the new chapter (111). If there's one flaw to the series at this point, it's lack of depth to the character pool which can make it feel a bit narrow at times. The author hasn't tried to handle too much at once, so far.
As for chapter 111:
! I'm really liking the cliffhanger. It's cool to see these rock/paper/scissors type abilities while maintaining a real world basis.