The teacher design was amazing, but I fear that more characters would just either be left in the background or slow the pace. We'll see.
In other news, this chapter cements it in stone: I'm in 100%, pigman truly IS the best character of the series. Sad to see the girls hatin' on my bro tho. I feel like he'll be the most important character in the aspect of moving the story, after all he's the only one that knows Sunwoo's past, and he's the only named male character apart from our MC, I bet he'll eventually become his first friend too (wich I think they already kinda are).
On a second note... Sunwoo said that she didn't hear the boys yelling. Is that something to do with her "condition"? Who knows!