In recent years, there has been a noticeable increase in individuals, primarily among young people, engaging in otaku activities. However, the mechanisms that differentiate adaptive and maladaptive otaku activities have not been examined. This study focuses on narcissism and passion as factors that distinguish between them. Specifically, we investigate whether differences in narcissism influence variations in passion for otaku activities. Furthermore, we aim to explore a causal model in which these differences in passion affect mood states during otaku activities, post-activity, and when activity is obstructed. The analysis results revealed that individuals driven by obsessive passion to engage in otaku activities tend to become ensnared by these activities and have difficulty switching between them and their daily lives. Future research should also focus on the type of "Otaku" activities and contents type
