Not gonna lie, Tsubaki looks like a younger (and more deranged?) Onee-san. Same author/artist as that one, but the plot here is...definitely something.
Two month gap is a mistake if it's part of the actual manga release schedule. There's too much to remember between chapters, and nothing ever gets answered.
So who is Yabu the rich girl or the one that tried to get isekai-ed? Also what are the random papers that she's burning at the end with Banri's parent's names?
Who was who again? Only reason I read this was for the MC's deadpan teacher mode comedy. Couldn't give a toss about any of the students or their "problems", let alone remember their damn names.