“when all we knew was us” is a lovely track from Montreal-based duo Mayfly. The group is made up of singer-songwriters Charlie and Emma, who are also fully self-produced. “It brings you back to this state of being completely vulnerable towards someone else,” the duo notes. The song is taken from Mayfly’s forthcoming debut EP, ESSENCE, which will be released on June 17th. “when all we knew was us” is out now on Apple Music and Spotify.