Critics are also praising the episode. The Korean Drama Review called it "a gut-punch of realism that avoids the saccharine tropes of typical school dramas."
A DAD in a tracksuit (LIFE COACH DAD) leans on Tired’s desk. Mr Teacher Episode 4 -- HiWEBxSERIES.com
(already walking away) We didn’t.
Unlike the lighter, more romantic tones of the first two episodes, Episode 4 adopts a somber, almost noir-like atmosphere. The pacing is tighter, utilizing close-up shots to capture the anxiety on the protagonist's face as he realizes that his good intentions are being twisted by the school's toxic politics. Critics are also praising the episode