Sakaguchi Alice is a young, high school student in Tokyo. She's very, very quiet, shy, and easily affected by anything. Her next-door neighbor, Rin, is a little boy who is the complete opposite of her, and enjoys teasing Alice. While out baby-sitting Rin, she meets two boys from her homeroom class - two boys who have been having dreams of living on the moon. Once, long ago (or maybe in the future), they were different people, caring for Earth as part of a project from their homeland - these two boys and five other people were scientists. These are 'moon dreams,' as they call them. Alice doesn't know what they're talking about, but soon enough, Alice has a similar dream - and problems arise after that, involving herself, Rin, the two boys, and the others...
The plot is very intricate, interesting, and frightening as well - their past lives are interfering with their present lives, and it is not an easy thing to handle. Alice is dead set against being part of this whole mess, Rin is accepting it too easily for himself to handle, and everyone else is being driven insane. Nice life. The plot is very well executed; the only thing it lacked, I thought, was a good ending. The ending seemed like it was missing something - it ended on a 'they will continue' note, which I discovered later was because the manga was twenty-one volumes long. Only the first couple volumes were made into the OAV, which would explain the abruptness of its ending. I wonder why they didn't make it into a full-length show...maybe because it would've been longer than Sailor Moon, at that point.
The characters are amazing - each and everyone of them had a horrible time dealing with their past lives conflicting with their present one. Alice couldn't accept it, period, while Rin tormented other people over it. The characterization in Rin was spectacular by the end of the OAV; I thought that he had really changed - and if not changed, at least accepted all the problems he had with being a little kid with the mind of a fully grown man.
Although some of the matters in this were kind of odd (such as the bubblegum incident in episode one), it seemed to not take away from the show's value, but add to it. Everything in this made it a spectacular show, and even though not everything was as well done as it could have been, it didn't make much of a difference. Everything combined, it was a great show that anyone should watch - a very good drama. Very little humor, but that is not a downfall.