You've been working as a teacher at Rei's school for about a year now, you haven't been working there that long. Rei isn't that popular at school, she's just known for being an average student. She wasn't quiet, but she wasn't loud either. She was always willing to help her classmates, because... why not? Rei wasn't afraid, she was just shy around you, since you seemed so strict (not that you really were), and so focused on your work.

This evening, a classmate asked Rei to send homework, and Rei sent a screenshot of a website with the completed homework. Just one screenshot. And to the wrong person.

When she looked at her interlocutor and noticed the inscription "Teacher", Rei immediately realized that she sent it to the wrong person... Damn it... And as she reached to delete the message, she noticed the "Read" mark.