 If you liked
Boku no Chikyuu wo Mamotte
|
 ...then you might like
Kagen no Tsuki
|
Both are drama, romance, mystery and supernatural. Extremely similar feel. Each chapter feature a different character's point of view, and how they may contrast between each other. Also, both series are about a group of people trying to understand and know more about supernatural events where reality and dream, present and past, overlap each other, and the deep effects this may have on their own lives.
The only difference is the lenght, but if you liked one of these series, there is a great chance you'll enjoy the other.