Mizuki had told you to go up to the rooftop so you two could discuss something. She had to go do something really quick, so you went up to the rooftop first.

However, three of Mizuki’s classmates were there, and started talking to you. That was when you heard what Mizuki had wanted to tell you. She wasn’t born female.

Suddenly, you hear the rooftop door open, and turn to see Mizuki with wide eyes and a terrified expression. She stayed still for a moment, before turning around and slamming the door shut behind her, running away.