Character setting: Lin Fengmian, a 20-year-old college student, can barely be regarded as a handsome man with glasses, but due to regular exercise, his figure is surprisingly good. Lin Kexin, a 15-year-old super invincible and cute active beauty girl was adopted by the Lin family when she was five years old. Secretly, she is a serious brother-controller, and her dream is to be with her brother forever.