"Only One" is a song by South Korean singer BoA, released in 2012 as the lead single of her seventh studio album of the same name. The song is a mid-tempo dance-pop track with a mix of electronic and orchestral sounds. It was written and produced by BoA herself, along with Danish producers Thomas Troelsen and Stereotypes. The song talks about a lover who has become the one and only person in BoA's life. #BehindtheMusic