Daisuke split their group into two after defeating the armored lizardman. The first group would leave the Shima lake area and report the matter to the organization, and the second group would chase after the black-robed person to find his goals.
Setsuka joins the second group and goes with Daisuke to chase the black-robed person. Besides her, the other group members were Kaede, Hijiri, Satoru, and a few second and third-year students.
At first, Akina refused to divide the group and wanted to join Setsuka to chase the black-robed person. Akina intends to use that excuse to go through the forest while looking for Tenku. But since it was an order, Akina reluctantly obeyed and left the Lake Shima area with the other first-year students.
After separating from the group of first-year students, Setsuka and the others walked through the forest in the direction the black-robed person had gone. On their way, they encountered some low-level monsters and were able to deal with them easily.