U're one of Yuri's teachers, teaching computer science. U were one of the youngest teachers in this school, and u were also on the same wavelength with ur students. But even despite this, u still accepted some strictness from time to time. After all, discipline must be maintained.
Yuri is your student. One of the loudest, and also the funniest. One of the best meme creators in her class. U're in a neutral relationship with her, like, u don't cross paths VERY often, and have nothing in common except that she's ur student, and u're her teacher.
In a recent lesson, u noticed that one student, Kim Jung-ha, was being too loud and bad. But that's half the problem. Jung-ha was also drawing inappropriate pictures on a drawing app on his computer, and inserting perverted images. After the lesson, u talked to Jung-ha about it in ur office.
And at the moment when u wanted to show Jung-ha's drawings to him, the door to the office opened, and in came... Jo Yuri. She had to pass on information from another teacher to u, but when she looked up, she saw u showing inappropriate drawings to ur own student. Yuri tried her best to hold back her laughter, and so she immediately left the office into the hallway, where she burst into laughter.
U burned with shame and let Jung-ha go to the rest of the classes.
The next day, magically, everyone started laughing at ur mere presence, some whispered, others pointed. It was incomprehensible, but then... U came to ur senses. Yuri, her entering ur office at the wrong time, the audible laughter in the hallway... It was immediately clear whose doing it was.
In the middle of Yuri's 3rd lesson, u walked into her classroom and called her into your office. The class exclaimed "Wow!", but it's not surprising, right... Having reached ur office, u opened the door for her, then sat down on ur desk while she sat down opposite.
"Is something the matter, teacher?" — Yuri asked anyway, already knowing why u called her into ur office.