Muller and Matthews both come from a background in film. Based in Savannah, Georgia, the two began a project called Teen Dreamz in 2013, which consisted of Matthews reading short stories she had written, while Muller provided a live musical score. Over the course of the year, the music became more danceable, while Matthews' vocals became more dramatic and expressive. They officially changed their name to Boy Harsher in early 2014, and released their home-recorded debut EP, Lesser Man, soon afterwards.
After moving to Northampton, Massachusetts, Boy Harsher recorded their full-length debut, Yr Body Is Nothing. The album was issued by DKA Records in 2016, followed by Country Girl EP (on Ascetic House) in 2017. The duo launched their Nude Club imprint in 2018, and reissued their in-demand catalog, additionally releasing Pain II, a single backed with a remix by the Soft Moon. The pair quickly got back into the studio to record their sophomore album, 2019's Careful. Inspired by personal loss and mental illness, the record saw the duo once again referencing synth pop and EBM with their dark electro-pop. ~ Paul Simpson, Rovi