River Flows In You and Kiss the Rain by Yiruma.. love these pieces!
Personally, I'm not a big fan of Yiruma, and I find that I can't learn much from studying his pieces. They don't offer me much technical gain and are rather unsatisfying musically speaking. They are pretty pieces meant to be played for friends in informal settings rather than a concert hall.
Plus, River Flows in You and Kiss the Rain are my least favorite compositions by Yiruma. His Chaconne and Elegy are much better pieces in my opinion
Having said that..
I recommend Schumann's Traumerei. It really is one of the greatest overplayed pieces ever. Played right (especially Horowitz's playing), it's one of the most beautiful pieces ever written for piano. And the notes are quite simple too!