This study aims to: (1) analyze the factors that contribute to the occurrence of premarital sexual behavior among adolescents in Kota Agung Village, Seluma Timur Subdistrict, Seluma Regency, Bengkulu Province; (2) examine the impacts of such behavior on adolescent girls in the same region; and (3) map out the preventive efforts undertaken by parents and the local community to mitigate and prevent the recurrence of such behavior in the village. This research adopts a qualitative case study approach. Data collection techniques include interviews, observations, and document analysis. Informants were selected through purposive sampling, and the data were analyzed descriptively using the interactive model developed by Miles and Huberman. The findings reveal that: (1) the primary factors contributing to premarital sexual behavior among adolescents in Kota Agung Village are addiction to pornographic films, weak parental supervision, negative peer influence, high curiosity, and limited understanding of cultural and religious norms; (2) the consequences of such behavior include early marriage, economic instability, psychological distress, disruption of family harmony, domestic violence, and a rise in child stunting cases; and (3) efforts to address the issue have focused on intensive communication between parents and their children, as well as community-led awareness programs and discussion forums. In conclusion, the phenomenon of premarital sex among adolescents in Kota Agung Village is largely driven by exposure to pornographic content and insufficient parental control. The dominant consequence is unplanned pregnancy outside of marriage. Meanwhile, preventive efforts mainly involve socialization activities and open discussions on the dangers of premarital sex and juvenile delinquency. Therefore, the active roles of parents, village authorities, educators, healthcare workers, and the wider community are crucial in promoting early education about the risks of promiscuous behavior and its potential consequences for the future of the youth involved.