If you thought puberty will be fun for the boy
@starburst98, puberty is going to be insane for Himeno - imagine her being even thirster than she is now, and desperately using her developing body to try and raise every flag in existence, all while it flies over the MCs head because his hormones haven't hit yet.
That said, Tsubasa, never grow. Watch her attract the boys' attraction before Himeno due to her being a tomboy. Played right, a tomboy girl doesn't necessarily have to fear puberty.