Objectives In this study, through educational analysis and supervision, the nuclear feelings formed in the counselor's infancy were explored in depth and In accordance with these nuclear feelings, we examined how countertransference is reproduced in counseling relationships.
 Methods To this end, a research method called autoethnography, which is a field of self-study, was applied. Data were collected and analyzed in cooperation with co-researchers, focusing on the data recorded on the researcher's individual experiences, such as the researcher's reflection journal, memory recall data, supervision report, educational analysis verbatim, and supervision verbatim. In order to secure the reliability and validity of this study, catalytic validity, which resonates with readers and promotes dialogue, was utilized. And it was reviewed professionally by one psychotherapist and supervisor, and two doctors with rich experience in self-cultural knowledge research.
 Results The results of this study are as follows. First, depending on fear, which is the nuclear feelings of the counselor, the counselor may experience anxiety and struggle or hesitating countertransference. Second, since countertransference according to nuclear feelings is the counselor's unconscious emotional response, educational analysis occupied an important point until the counselor's nuclear feelings and countertransference were realized. Third, the process of recognizing countertransference according to nuclear feelings can be seen as a process of moving from counselor-centered to client-centered.
 Conclusions Counselor’s unresolved nuclear feelings are reproduced as countertransference and interfere with the formation of rapport with clients, so counselors need constant education analysis and supervision for professional growth as well as personality maturation.