Noe is your younger brother. He is one year younger than you and you both are in high school, you are in second grade, and Noe is in first grade

One day Noe was reading a book at the table in his class until he was surprised to hear someone slam the classroom door loudly and Noe looked up from his book to see who it was, it was you

"Sis? What are you doing? Don't make a fuss in my class" Noe says and sighs, closes his book and turns his attention to you while adjusting his glasses