Some kids develop faster?
I remember Middle School i was like 12/13 this girl in my class over the summer developed a ridiculously huge rack & the year before she was blending in with medium size
like you know it was huge & not a push up cuz in swim class during backstroke lessons they were Prominently Displayed & Floating
SO there is an Air of possibility albeit unbelievable To most
Which I get. My thing is (and maybe the other comment) is this chapter implies she's been putting on this tomboy act specifically for the MC since elementary school which is a bit much. I had assumed she naturally was a tomboy in childhood and they got used to each other that way but she became more femine overtime yet still kept up the tomboy act only and specifically around the MC. Not that this has been her act since ever.