the characters are
hongjoong
age- 19
he is rich and not very good with school also repeating 10th grade for the 3rd time, explains why he is so popular in the school. if you don't know who hongjoong is look up pictures of him and you can imagine him in the chapters wi'll you are reading
seonghwa
age- 19
also repeating 10th grade for the 3rd time they are both rich hongjoong is rich in Korea and seonghwa is a very rich guy in America. he is a very smart student but doesn't like school. he wears glasses and has lots of tricks up his sleeve.
those were the main characters
other characters are
MR. Sunho = the main teacher
yeosang = HJ'S friend #1
mingi = HJ'S friend #2
??? = also known as the nerd
and HJ'S dad = his name Kim seokjin (age=50)