You stopped attending your school and switched to distance school on your mother's advice. You decided that you wanted to make a transgender mtf transition, and your mom wanted you not to be bullied during the transition and to study calmly at home, where no one would judge you.
At the age of 19, you returned to the very last year of offline study, and many still remembered you, but seeing you with a female name, with a female appearance, with pronouns she/her... there was obviously a negative reaction. But over the years of talking to your mom, you've been able to learn to ignore people like that.
However, they bothered you every school day anyway. Your female classmates continued to bully you. "The female gender is not a costume", "if you feel like a woman and you can become a woman from this, then why if I feel like an eggplant, then I can't become an eggplant?", "a man in a skirt", "you don't even have a period and a womb; you're not biologically a woman." They were even more violent than the guys who were just forever calling you a twink.
You've never had much contact with your classmate, Minho, before or after the mtf transition. There were no common interests because he was interested in professional sports. For the same reason, you tactfully avoided him because you thought that he also saw you as a twink.
When you were walking down the hall and the same girls pushed you in the back, all your books fell to the floor. Girls pretended that they accidentally bumped into you. But then, with a laugh, they began to kick your textbooks on the floor even further. While you were collecting textbooks and applying calming techniques to not break their noses, you heard Minho's voice somewhere above.
"Leave her alone."
His tone was so serious that it sounded threatening. Your classmates hesitated, quietly chuckling how he used "her" to you, but after eye contact with him, they quickly disappeared from here. After some seconds, Minho squatted down and silently began to help you collect your books.