"여자친구의 남자친구" translates to "Girlfriend's Boyfriend" in English. It is a popular South Korean song by the girl group 여자친구 (GFRIEND), released in 2016. The song explores themes of love and jealousy, depicting the feelings of a girl who is in love with her friend’s boyfriend. The song features catchy melodies and relatable lyrics, resonating with many listeners. It showcases the group's signature style, combining upbeat pop sounds with harmonized vocals. 여자친구 gained significant popularity in the K-pop scene, known for their energetic performances and strong fanbase.