Someone call the poison emergency hotline, this shit is highly toxic.
Curious where this goes from here. Didn't see the teacher coming, despite foreshadowing, don't really get what Ami is feeling/thinking/scheming right now, don't really see what Mami-sensei is feeling/thinking right now, but it sure is ugly.
By all means, please do continue, I wish to gobble up the rest of this vile, toxic mess.