Son preference—the institutionalized notion that sons are preferred to daughters and its various ramifications—is a world wide phenomenon that is particularly prominent in Asian countries such as Korea. Despite its prominence and ill effects, little research has been done in this area beyond limited statistical studies. This qualitative research study presents work done by a music therapist with a group of Korean women who experienced son preference. It addresses in depth the psychological effects of son preference in Korean women throughout the life cycle. Their lived and relived experiences as children, adolescents, and adults; as daughters, wives and mothers, create a mosaic of experiences which, when pieced together, form a global picture of the cumulative effects of the son preference phenomenon. Feelings of being unwanted as children, of not being loved, of shame in their femininity, which result in depression as adults, were commonly reported. However, this did not deter them from continuing the practices of son preference in their own lives and with their own families. The feminist research principles that guide the research and the music therapy principles and practices that guide the clinical interventions are described in detail. The challenges, drawbacks and advantages of a single practitioner in the dual role of researcher and therapist, as well as conducting therapy and research simultaneously, are analyzed. Music and music therapy techniques were found to be indispensable tools in the conduct of the therapy. They enabled the researcher to gain insight into the participants' responses; enabled the participants to experience play and free expression—some for the first time; fostered the various kinds of self awareness necessary for the group members to come to an understanding of their personal experiences and to broaden their understanding of the pervasive effects of son preference as a personal, social and cultural phenomenon.