Cognitive-behavioural therapy (CBT), attachment theory, and humanistic psychology improve mental health by restructuring individuals’ cognition, relationship dynamics, and self-exploration. This study aimed to examine the relationships between CBT, attachment theory, and humanistic psychology in improving the client’s mental well-being. This study adopted qualitative methods, including observational data, counselling transcripts, and interviews, involving only one client. The findings showed that integrating therapeutic methods effectively addresses profound psychological challenges. The findings indicate a positive progression in the client's overall quality of life, suggesting the potential of integrated approaches in fostering meaningful counselling.