Where were the gay girls when I was in Highschool?
This is set in middle school.
I'm not sure what it's like for others but in my country's case (before K-12 happened), we don't have middle school and we go straight into highschool after 6th grade. Age 14-15 was Junior year in highschool for those who had a similar educational system.
I can't remember, is Anna "in middle school" as we in the US would interpret it, or is she a "freshman" as we would interpret it? The final/highest grade in Japanese middle school equates to US 9th grade, which is high school here, albeit the lowest grade. Not that it makes it any better being a 7th, 8th, or 9th grader.
Regardless poor Anna is Awakening To The Adult Urges courtesy of a lot of help from a lot of apparently thirsty lesbians around her, lol...