This study aims to invest the journey of a music therapist’s self-awareness of guilt rooted from his nurturing environment fostered by a single parent. To this end, the music therapist researched his own journey of such awareness using arts-based auto-ethnography. The findings of the study are as follows. First, the hardships that the researcher experienced as a single-parent child, along with the dishonest speech and behaviors that he adopted to avoid discrimination from others, were related to the social bias that casts a negative light on single-parent families. In addition, the researcher was found to withhold feelings of loneliness and fear from those negative perceptions, even as an adult. Second, the researcher was able to establish his self-identity through the process of training as a music therapist by introspecting and confronting irrational feelings of guilt that he had previously kept oppressed, as well as other emotions that had been hidden behind such guilt. The researcher was also able to grow professionally as a music therapist throughout the research process. These findings are meaningful in providing insightful information on the researcher’s growth experience as a professional music therapist, based on his in-depth understanding of sociocultural background and self-reflection.