Most works with this title pattern follow a 3-act rhythm:

Thus, the “cool teacher falling into ahegao at work” might be a hallucination from a student’s perspective. This framing grants plausible deniability: the taboo content exists in the mind, not reality.

(Also, I would like to confirm if the title and topic you provided was on purpose or a typo.)

The final stage of the work was the total collapse of her dignity. The script forced a "teochi" (surrender)—a psychological white flag.