‘Religion’ was first introduced as an elective subject in the fourth National Curricula (1981~1987). After going through several rounds of national curricula, the subject was renamed to ‘Religious Study’ in 2011, and the Ministry of Education provided detailed guidelines on the nature, goal, contents of ‘Religious Study’ in National Curricula revised in 2015. These standardized guidelines on common curricula reflected the ministry’s mandate for religious schools to avoid education on specific religious sects and to strengthen education on overall religious knowledge. Five years have passed since the revised National Curricula came into effect, and it is time to examine whether religious schools are offering a course on ‘Religious Study’ and providing education on religious knowledge. For this purpose, we mostly focused on the issues regarding textbooks for religious study, which is a key learning tool, to understand the current state of religious education given at religious schools. Specifically, an in-depth interview was conducted with teachers in charge of religious education at Catholic high schools in Korea, to understand how textbooks are used in class. One of the notable findings was that teachers in charge of religious education at Catholic high schools did not choose ‘Religious Study’ and instead opted for ‘Living and Personality’, which is a subject involving creative experiences. And for the class ‘Living and Personality’, the teachers used textbooks that covered education on personality and character-building. This suggests that religious education at Catholic high schools has shifted from education on religious sects and knowledge to broader education on character-building. However, it was observed that underutilization of textbooks on personality and character-building did not merely reflect dissatisfaction with textbooks for religious study, but created a fundamental problem of confused identity regarding religious education. We applied the concept of charisma established by Edward Shils and interpreted this phenomenon-problems contained in high school textbooks and teachers’ confused identity-as a process whereby charisma expanded from the core to the periphery.