Is it me or do I see a lesbian couple on the last part? o.o Cause that's too close to be 'just' friends. Plus they kinda look like the main characters too, but from the back. Like seriously there's so many brunettes and blonde lesbian couples xD
In Russia it would also be 10th grade.
What's more, there's no such thing as middle/high school differentiation.
In fact, if you translate it literally, the "high school" would mean University/College here, and the regular school is called "middle" until graduation.
it's 10th grade in Vietnam too. I dont really care much how you guys do it though.
Btw I checked out a few pages of this series on pixiv, seems pretty fucking gay xD