This exploratory study aims to broaden students' models of cyber-aggression behavior, with the Theory of Planned Behavior (TPB) by including additional constructs, namely cyber health, to predict youth cyber-aggression actions. The self-administered questionnaire was used to collect data from 291 students intentionally, aged 15 to 21 at secondary schools in the city of Padang in Indonesia, and then analyzed using covariance-based structural equation modeling (SEM). Data analysis was performed using WarpPLS software version 4.0. Structural equation modeling is used to test whether the overall model theory of planned behavior (TPB) helps predict self-reported actions by adolescents in cyber aggression. We found a strong positive relationship between adolescent attitudes towards cyber aggression and their behavioral intentions to do so, followed by perceived behavioral control variables which were also significant although relatively less important predictors of adolescent intentions for cyber aggression, while subjective norms were not significant in determining adolescent intentions for cyber aggression. Meanwhile, cyber wellness, which is predicted as a moderator variable in the development of the model, is not proven and has the same status as other exogenous variables. Overall, this study provides strong support for the theoretical utility of TPB in the research of students of cyber aggression.