He is no longer the passive observer. In 142, he takes the lead in several scenes, showing he understands the leverage he has over the others.
The chapter title's namesake is felt here as Daeho continues to "learn" and "teach" lessons of intimacy, pushing the boundaries of the household's social structure. III. Character Dynamics secret-class-chapter-142
Her character arc in this chapter shows a point of no return. The "secret" is becoming harder for her to manage, leading to increased anxiety and moments of vulnerability. IV. Key Themes He is no longer the passive observer
A significant portion of Chapter 142 involves June. The dialogue highlights her internal conflict—struggling between her role as a maternal figure/guardian and her growing physical and emotional attraction to Daeho. secret-class-chapter-142