The thorns on the rose are for self-protection. They are the self-protection consciousness derived from being tortured by the outside world. He is not wrong, and he has no thorns. Shouldn't it be the outside world's malice towards him that is wrong?
Gao Yuan, Guo Yuan, and Chai Luxuan are Chen Yu's roommates and Chen Yu's good friends all the time (the other protagonist is Yu Shuo)
Purpose: Protect yourself