I'm afraid you cooked with this one
It’s definitely a possible theory, the splitting pain he feels whenever he remembers his father might be related to that, possibly killing him. Also, seeing Guwon kill his father, it’s possible that Guwon was right there when it happened. Just look at that smiling face of his, it might be hiding a secret meaning behind it lol well, that would be so fucked up.
Im going along with ur theory and ganna say that the reason he killed his father may have also been because his father betrayed him, hence also why he would block it out even more.
i thought about this too! it'd be really interesting for him to actually clash with his own morality and realizes that he might not be so different from guwon
i love how we all collectively agree that this might be it and still finding it really disturbing & jarring even if predicted
hell yeah maybe guwon even witnessed it and that was one of the reasons he thought teach was interesting
i don't really remember what his father's job was but i hope he's not behind this whole maggot situation
it'd be so fire if it turned out that teach killed his own father and blocked out these memories (kinda more twisted than guwon being the ultimate villain tho)