
https://www.mangago.zone/read-manga/cloud_1/uu/br_chapter-177679/pg-30/
First, I don't think that's the pedo elementary school teacher. I think the teacher is actually concerned for Cirrus, at least since ep 89 when Cirrus said he rather be at school than home. My guess is that when the teacher pulled Cirrus aside to talk personally in ep 102, Cirrus lied and said he got into a fight at the convenience store (mix truth with lie) bc he didn't want tell him that Skylar beat him up (lmao) in ep 101. I guess that way if the teacher inquires more, Cirrus can say Skylar was there? So Cirrus and him have already talked before and Cirrus had no negative reaction towards him.
Possibly the teacher thinks Skylar is a bully? The teacher saw Skylar throwing the first punch in the convenience store fight (95-96) and even coming up from behind with a fist full of rage, and before that Skylar was loading up at the checkout with food and choco milk for the housewarming party. So the teacher thinks "maybe he's extorting Cirrus", who has been perceived by others as feminine, girly, skinny, frail.
And now the teacher sees Skylar with fancy new shoes...hmm
This could very well be a reach tho