Yunna doesn’t seem to be into giving spanks, but she sure loves taking them. Togo probably asked her to try to top her at least once (cause top doms wanna take a break sometimes) and asked to be spanked.
Idk if it's the same as anywhere but in my previous school (a secondary/hs level), school nurses aren't strictly nurses. They're basically licensed teachers with medical training of some sort like first-response team etc. So, afaik, this stuff will be a problem here.