This manga appears rather boring on the first glance but trust me after you read the 1. Volume you want to buy the other four, too.
The story seems pretty simple at first: Some girl from the Future trying to make things better. Sounds boring? It does, if that was the only element of it. in the first few chapters you get to see something that can only be called pure romance. but moment after moment you beginn to think: Hmm... there is something else going to happen. and then suddenly starts the action. Unexpectet? when reading the first time: yes. after that the story develops nicely with smooth changes from action to humour to romance and back to action. The story doesn't seem to forced exept the ending, which even if it was a nice twist came rather unprepared over. Overall it is very interessting and even if the fights do have a very dragonball-ish feel to it one can largly irgnor it.
The art is clean and show much love when it comes to details. even things that normaly are only drawn in a round about way were given some time to draw probably and it gives the surrounding a nice feeling. all in all i'm actually very impressed by the art.
There is character development, there are flaws, there are changes. Whats there more to say? these characters that make up the main part of story are fleshed out and seem realistic and can be related to easily.
Well I enjoyed the manga very much and can only say that if you haven't read it yet you should do so now