PURPOSE: This study was to develop a substantive theory on the conquering experience of group-bullies among teenagers, and thereafter suggest a model for solving the problems. METHOD: Data collection and analysis was proceeded by a method of Grounded Theory. Data was collected by interviewing the participants. Five teenagers participated in this study who had already overcome the situation. RESULT: In the analysis 31 concepts, 6 categories, and 14 subcategories are extracted from the raw data, and all are constituted on the paradigm model. The causal condition is a painstaking of participants. The context is affirmative reconsidering and the phenomenon is conquering difficulties. The intervening condition is a positive intervention of a supporting system and the strategy for action/interaction is building a relationship. The consequences of this analysis is harmonizing. CONCLUSION: The results of this study suggest adequate ways of conquering group-bullies. These are positive attitudes towards solving problems and the full use of support systems surrounding them.