The Rich Stay up All Night

Looking for Novels Similar to a Lifetime Owl Maniac

Want to watch something similar to "Others are undercover with a guilty conscience, but you go undercover with a weak kidney?" (A Lifetime Owl Maniac)" book. Find some novels that are similar to the battle in the capital. The protagonist is the second or third generation of the courtyard. But he is not invincible or brainless. The heroine is an older sister or aunt.