This article discusses the popular piano song "River Flows in You" by Yiruma. It explains that when someone requests a piano song, this is often the one they ask for. The article highlights the emotional and beautiful melody of the song that resonates with listeners. It also mentions the growing popularity of Yiruma's music and his ability to capture a deep sense of emotion through his compositions. "River Flows in You" remains a beloved choice for those seeking a piano song.