This show at the start of the seasons was one of my fav... though it relies WAY too much on fan service is still has a lot of humor to it and interesting art direction.
The story is about A boy, Niiya, who can see a ghost girl, Yuuko. it focuses on her regaining her memories and dealing with another evil ghost that seems to be roaming the school.
however it isn't that easy and the more they learn the more painful the situation gets and of course not all is what it seems to be.
I love then music for this show, especially intro and ending and it's till one of my favs this season but the ending.... but i've seen too many 12 ep animes end like this so.... kinda annoying but it could have been much worse. Still overall i really enjoyed it and i look forward to the new summer titles.
The whole thing can be seen Legally on Crunchyroll so go check it out.
also can't say much more cause yeah.... spoilers for such a short show.