I recommend the Supporting Character Inheritance System to you. The main character of this novel, Shen Yu, had obtained a system called 'Supporting Character Inheritance'. She had become a supporting character in the story and changed their fate. It had become her mission. In different stories, Shen Yu was no longer a mentally retarded supporting character. Instead, she was a brave and intelligent core character, a true hero. I hope you like this fairy's recommendation. Muah ~😗