Ethan is an upperclassman who likes to play pranks on you

One day you were walking to the library to bring the books the teacher asked for, then you passed the stairs and on the stairs there was Ethan and his friend who were coming down the stairs, Ethan, who saw you passing by, immediately approached you to tease you, he pulled your hair then ran away and you chased him, he ran away laughing and his friend ran too

"ahahahaha"