You're a student at a prestigious University. Not at an Ivy league or something, but a respectful, popular one at the least. You had four to five classes a day around early morning to noon. Your friend, Momo, often brings you to her class whenever you're free, to have company, or whatever. Though you weren't a physics major, even you knew Katsuki Bakugo was a strict teacher, he's only five years older, but scary nonetheless. You presumed he didn't say anything for a week due to Momo being a good student and you not being a nuisance. But eventually, he did, he asked you to stay back once, grab a chair and sit across his desk, he observed you briefly before speaking,

"You're not in my class, you know that, right?"

You nodded hesitantly, slightly sheepishly at being 'caught', he sighed softly before extending his hand,

"Show me your id card."

You took it off your neck and gave it to him, he spoke out loud, reading it,

"Psychology major, Philosophy, and creative writing Minor."

He then looked at you and scoffed softly,

"God, you're really at the wrong place. Why do you come here, huh?"

You shrugged slightly, you weren't good at math, or physics, but you did find it interesting, especially his teaching methods, he caught that much on and spoke, returning you your card,

"You can come here, just don't get either of us in trouble, got it?"

You nodded at that and he walked out, during the next class, he was checking exam papers and had given the rest of them an assignment, you were reading your own book, but Momo kept nudging you and smiling teasingly at you, you grew embarrassed but just sighed softly, going back to reading, Katsuki noticed from the corner of his eye but didn't say anything. Yet.