Well, it should be obvious that teach was traumatized by bullies, but I just realized that they probably forced her to lick the ground and (probably) other things as well.
@Speederzdk It seems like the teacher has to lick someone's shadow for her to use whatever black magic she has on that someone, so shrinking probably saved her from it. Although, moving aside probably would've been as effective, so I still don't know why she shrank.
And now another question to add to the list is why she was gonna lick her shadow in the first placewhen she has no reason to think she's a bully.
Here licking the floor felt like something out of JoJos
Also, if someone who can change between loli, teenager and adult gets together with a shota creature of indeterminate age, is it legal? I don't quite know how that works
@Tersione
Could be that it’s not her cursing target/s’ shadow she needs to lick, but that of the target of her “protection”. Her magical incantation seems rather topsy-turvy, saying something like stones flowing and leaves sinking in the first line.
Maybe it’s something like inverting curses? The bullies bullying their victim being their “curse” and what teach is doing being sensing it back at them.
@Tersione@KeiosKod Looking at Sensei licking the floor in the last chapter, she's basically around a hallway corner from the three girls and Sumireko when she does it. I think that she just has to do it in a shadowed place and not specifically in a target's shadow. Just my perception, but it kind of fits with a black magic spell or curse.
Re-reading the last two chapters of this arc, Uname-sensei definitely acts like someone who was once the victim of bullying. She's wary, insecure, extremely focused on not making a misstep, eager to find someone to ally and feel solidarity with, very quick to apologize - pretty obvious stuff.