Oh My Girl attained an extraordinary milestone on the MelOn Daily Chart Top 100 that made them the first K-pop girl group in history to do so.
MelOn is the largest music platform in South Korea and is generally used by the public, with more than 28 million users. While other music charts in Korea are based on streams, MelOn focuses on the number of unique listeners.
Hence, for the MelOn Daily Chart, songs are ranked based on the tallied unique listeners within 24 hours. Since it is based on unique listeners and not streams, it is difficult for K-pop songs to chart as not all Koreans would listen to them.