More like the canon age range of the protagonists. May is an outlier with her sarcasm because she's around 12 yet haven't had one (where most girls got their first period, so she's most likely already informed of periods and whatnot but it has quite wide range from 8 to 15 depending degree of maturity and nutrition), while Selene is confirmed to be around 11 (the youngest age you can participate on Island Challenge is 11, and Hau, which is said to be at the same age with the protagonist takes the island challenge as soon as he turns 11).
Are you alright?
I have medicine, do you want some?I'm on the second day now...
It hurts...Me too...
I worry about it leaking, and my blood pressure lowers too...Seriously. Having this every month suuure is great...
I'm not sure whether or not to emphasize the sarcasm.