Assessment of the affective domain is one of the activities carried out by lecturers in order to measure and determine the achievement of learning objectives. The affective domain is related to the attitudes and behavior of students as educated people in interacting with lecturers, other students, and their environment. Harmonization in socializing is concrete evidence of the application of the affective domain. The purpose of this study is to find out and describe the extent to which the affective domain contributes to online learning for postgraduate school students in the digital era. This research includes qualitative research with a case study approach. Methods of data collection using observation, interviews, and questionnaires. The number of samples in this study was 20. The samples were graduate school students in the third semester of the 2023 academic year. The results of this study showed that graduate school students preferred offline learning or face-to-face learning in class compared to online or online learning. Even though in today's digital era, Postgraduate School students still uphold ethics, courtesy, and good attitudes towards lecturers, fellow friends, parents, and their environment.