 If you liked
Unbalance x2
|
 ...then you might like
Kimi no Iru Machi
|
Both of these series have great artwork and deal with quality romance. Both also contain well developed suspense that will make you want to read through all the chapters in one sitting. UxU has a bit more ecchi, however both series are a bit more focused on the relationships than the fan service. If you liked either of these series I suggest you check out the other!