A research team from the Center for Life-Span Development (CLSD), Faculty of Psychology, Universitas Gadjah Mada (UGM), is initiating a qualitative study to understand how Indonesian adolescents define mental health, the challenges they face, and the protective and risk factors that shape their psychological well-being. National data indicate that 34.9% of adolescents experienced mental health problems in the past 12 months, yet only 2.6% have accessed services. In response, this study seeks to foreground adolescents’ own voices to ensure that resulting interventions genuinely align with their lived experiences. This research is funded by the 2025 UGM Faculty of Psychology Research Grant.