I thought exactly the same thing, and that chapter was so frustrating. The teacher just decided “I’m going with the Hounds ?” And ?? that it? No plan of action? Didn’t he even prepare for the simple possibility that someone might suspect him? His face literally said "Yes, You found I plan to kill you". He’d already messed up a bit by taking out the doctor’s ring. Seriously, did he have to make it so obvious? And the girl (personally, I think she’s pretty) did she have to say Guwon’s full name? Everything’s a mess, and honestly, the teacher is just way too lucky.
This is exactly it! Teach literally put all his stakes on pure luck and a temporary physical attraction in the middle of a literal apocalypse! He really thought he could just leverage Guwon's obsession with him to survive. Personally? Risking the fate of the entire village just to bet your body on someone who has zero moral compass or human empathy is wild! If you actually claim to have the moral high ground and you're fighting to save humanity, you need to be smart and real about your goals! You can't just cry, whine, and gaslight him into thinking you're innocent just so Guwon won't end you!
Like, you easily could’ve mind-gamed Guwon into being more merciful and following your strategy instead of trying to completely wipe him and the Hounds out! Honestly, playing the long game and manipulating him would’ve been so much easier than attempting a whole coup and trying to overthrow the system.
P.S: My bad for calling her ugly, didn't mean to drag her like that.

Jinwoo’s sheer stupidity is actually giving me a stroke!! You absolute clown, you’re making a fatal mistake by starting something as major as trying to take out Guwon and wipe out the Hounds without an actual game plan!!! You didn’t even map out exactly how you'd pull it off, you have zero backup plan in case someone catches on, and you didn't even consider the possibility of Guwon getting suspicious or how you’d clear your name!
And look at you now? You’re literally main-suspect no.1 to all the Hounds, they’ve already clocked you and ran to Guwon, and the moment you got questioned, you almost pissed your pants! Your behavior is screaming panic, it’s giving guilty AF! Your entire strategy is relying on the fact that Guwon is obsessed with your ass? I am not betting my cakes on a piece of ass in the middle of a literal apocalypse! Give me a fraction of your unearned confidence and I’d literally rule the world!
And to top it all off, that ugly girl just handed over all the cards to the snake. Y'all are completely cooked, it’s officially over for you, and honestly? No wraps.