At the beginning of this anime, the story seems like it will follow the run of the mill harem path. It does do that for awhile, but I think that it deviated from that path as the series progressed.
There are some interesting elements to this show like the gift and the eternal rainbow over the town which keep you wondering what they are, which is rare because you can almost always tell what is going to happen in a normal harem show from the first few episodes.
The ending of the show has more intense drama than you might expect. Overall, this anime is pretty good. I would recommend it to any fan of the harem/romance genre. It's not the greatest thing ever but definitely worth a watch.