Setting

When Hina gets to earth as a Guardian Heart, she is seen by Kazuya. Now she must live with him and try to avoid anyone from knowing her secret. What little she knows is that all the other girls that live at her dorm are secretly searching for a Guardian Heart in their vengeance quest.

Pacing

This is just the title to watch when you have absolutely nothing to do. This is simple, pointless, and filled with ecchi to satisfy the male audience.

Don't expect anything, and you might like it.

Conclusion

Guardian Hearts is an extremely light and superficial title. Although the art style is quite pretty, the plot and characters are the perfect stereotypes for the usual harem anime.

What makes Guardian Hearts different (in a negative way) is the near to no worry about any continuity or character development. Things simply happen without much cause-effect preoccupation, nor a logic explanation. And when there is an explanation, it's something ludicrous. So there you go: Ecchi for the masses!