Gu Yan: A bad student who loves to fight and shows a pig-headed face even when he transfers to another school.
Cheng Shuo: A cold and sinister student
One is a poor student who works hard to pay off debts
One is a standard wealthy third generation with a driver to pick you up in and out and a nanny to take care of you when you get home.
Intention: Even if you are in darkness now, you will eventually meet your own light