Conflict between social groups is rife because of struggle for territory and limited opportunities to make the group's name big. This study aims to determine the picture of the conflict between Korean Pop fan groups on social media that have been carried away in real life. The fan groups in this study are EXO-L and ARMY. Korean pop fan groups who have been in conflict since 2016. The method in this study is qualitative. Using an exploratory case study design, a single embedded case design. Data obtained through interviews and direct observation, from the subject DR (EXO-L) and ANJ (ARMY). The results obtained indicate that the conflict between these fan groups is in accordance with the experiments conducted by Sherif et al. (1988). This occurs because of the competition which frustrates the group, which causes stereotypes, prejudice and discrimination between groups. The impact of this conflict was even experienced directly by the two subjects, because both of them are good friends in terms of studying but not in the world of K-pop.