This study aims to explore the meaning of the revelation of Teacher Agency(TA) before-and-after COVID-19. To do so, we conducted a qualitative case study focusing on teachers' experiences in A-middle school. The findings of this study are first, the experience of cooperation and relationship that were built before COVID-19 has been continued COVID-19 situation. Therefore, the role of the active supporter of students' learning constructed before COVID-19 transformed itself into caring for the children during the COVID-19 situation. Second, since teachers were not able to plan and manage the learning-centered-instruction due to the COVID-19 situation, teachers reflected on the educational goal and strategies of learning-centered instructions. Also, teachers started to struggle with how to build a relationship with students even in the online learning situation. Moreover, they reflected on the goal and the future direction of the teachers' community-class research society. Finally, teachers reflected on self-identity. Teachers faced two situations - the relationship-centered approach is becoming harder to manage, and at the same time, they continued to play their role as the supporter of learning through caring. Consequently, teachers asked themselves whether they are professional teachers or a caregiver. Based on the findings of this study, we focused on the features of TA that are experienced in the stream of time. We found out that before-and-after COVID-19, teachers faced the opportunities to reflect on their role and position in the diverse relationship. Also, we noticed the inner conflict in the process of reflection that becomes a meaningful experience. Hence, we maintained the importance of time and the opportunities for reflection to understand the concept and the practice of TA. Moreover, we suggested that the conflict that occurs in the process of reflection should be dealt with actively.