I saw the previous chapter (7) as drama, with that drama resolved quite nicely when Kase-san appeared; the audience had seen Yamada obliviously walking into a situation for which she was grossly ill-prepared, and then saw Kase-san come to her rescue. There was no cliff-hanger; at the end of the chapter, we knew that Yamada were safe. This chapter (8) was essentially just Yamada and Kase-san talking-out the situation, each seeing and acknowledging what she had failed to see. And, because of their love and their honesty, they emerged still better adjusted as a couple.
I was, frankly, a little surprised that Kase-san didn't have a better grasp of the situation at the outset of this chapter; but, though certainly less child-like than Yamada, Kase-san is still young.