At 18 you can't drink, but wild sex is allowed. In my country 18 is the legal age for almost everything, with exceptions for taking certain public positions.
Was expecting Tona to fall for Tadapi after meeting him or possibly be a lesbian but no the surprise was the teacher & her reaction to their reunion. Thanks for the unexpected chapter.
I called it at the start. This girl may dress like that but she really doesn't have any experience with men. Soon as she mentioned the homeroom teacher who I assumed was a guy it was: Yeah, shes in love with that dude and will be a mess seeing him,