Buddy. This is a work of fiction. This manga is not representative of reality. I'm not really sure how you made it past Kusuri without realizing this, while also thinking she was totally fine, morally speaking.
You don't have to like it, obviously, but the arbitrary line-drawing over fictional...
Alright, I'm on my second read-through of this manga and I need to rant about Suu.
There is absolutely no reason for Suu to not like Math. None.
The reason she gave was... absurd. Number don't "go" anywhere when doing calculations. Numbers and counting are a human invention.
If I have a donut...
It's hilarious how Rin's intro literally just doing the one joke you expect her to do (paddle Iku) and Karane calling it weird, and then IMMEDIATELY pivots to something else (and that something else is kino).
I love Rin, she's a great character, but this is definitely one of the few rare...