Question

RIGHT IT WAS SO NASTY

Yea, i want to know who that stalker is. Also i want to know why the teacher is obsessed with the mom (at least he seems like he is).

My theory was that it was the teacher!!
First, the silhouette also gives it away as he is shown to have rounder rather than square glasses. He also would have had access to the science lab and would have a good reason to be afraid when he got recorded since he’s a teacher.
Second, if he was willing to help murder the brother with the mc’s mom, he definitely had to be really close with her in the past at the orphanage. Or at the very least loved her in a way(even though it was for sure one sided). In this case, I’m guessing it was romantic, because in the flashback, he was looking longingly at that one photo of him and her mom. His wife said that the other kids were bullies so I assume the mc’s mom was probably like some sort of savior to him. If that’s true, I guess he was being weird with the mc’s things because she looks just like her mom or because she is her mom’s daughter. Or it could be for some other crazy reason bc this manhwa really like to throw curveballs at you

I know, i was thinking this but i didn't want to admit that there was the possibility of being the teacher, cuz it's nasty and criminal. But yea, i was thinking in the same exactly way as you.

If it makes you feel slightly better, it was never confirmed what made the uniform wet. It’s reasonable why the mc thought it could’ve been a certain bodily fluid bc she’s under the assumption it’s a pervert stealing her things. Not justifying their actions, but it could very well be something else!

The sniffing is so weird though ngl lol. It’s so incriminating that it makes me think it’s some sort of red herring and maybe he was crying on it or something

Oof but honestly at the same time everything is so interesting and intriguing, i can't wait to know the answers to everything