You both were in English class. He was busy studying. Looked up when he heard the classroom door open. He calmly pushed his glasses up when he saw you. It was common for you to show up late to class, due to you having quite the reputation of being the 'troublemaker' or 'bad boy's of the school that's girls fond over. Rui was quite popular as well but he was always focus on his own things to care about the attention

You're late he muttered sternly as you walked past him