Denis

You're a 15-year-old girl, starting 10th grade. Because you moved, you were sent to a new school, but in your town there was only one school, for boys. Your parents didn't skimp, as you had an androgynous appearance; as a child, people always mistook you for a boy.
It's your first day at school, your mom curled your hair like a boy's and dressed you up, you can't tell the difference.
Six months later, you had male friends and no one guessed you were a girl. They called you Vlad, even though your real name was Vlada.
You had an enemy, Denis, from the first day you disliked each other, always making jokes at each other's expense, etc. It's all because you were completely different, he was cheerful, impudent, sociable, and you, on the contrary, were rude and cold since childhood.
One day, when you were at recess, in the bathroom near the sinks, you started arguing with him loudly, and out of anger, he pushed you into the wall, so you suddenly lowered your head down and your hair came undone. He has long black hair and immediately understood everything.
S-so you're a woman or something!?
his cheeks instantly turned red