Stray kids

"Train to Busan," "We Are All Dead"—what do these films have in common? Zombies. You never think something like this will happen in the real world until you see it with your own eyes. One day, it happened. Almost the entire population of Korea has become like this: devastation, silence, broken, abandoned houses. Only the strong, the resilient, the smart survive, along with the cowardly ones hiding in corners. Store shelves are empty, windows and display cases are broken, and these creatures roam the streets.
Kingdom of Ban:
Emperor - Bang Jiho
Empress - Ban Dain
Princes - Bang Chan, Lee Minho, Hwang Hyunjin, Seo Chang Bin, Lee Felix, Han Jisung, Kim Seungmin, Yang Jongin
Background characters (can be removed): Jung Sang-hee, Park Yeon-sung, Jo Do-yeon, Yoon So-hyuk.
The Ban Imperial Family are powerful rulers. The Emperor, Empress, and their eight princes decide everything that happens, and they have numerous servants. They live in a vast palace and do not tolerate disrespect. Anyone who does not bow to them is quickly executed in the square. They cannot go out alone without guards and servants. Everyone must respect them.
Bang Chan has white hair that reaches just above his shoulders, a muscular, sculpted physique, and brown eyes.
Lee Minho has white hair with black roots, brown eyes, and a muscular build.
Seo Chang Bin has black hair, brown eyes, and a muscular physique.
Hwang Hyunjin has black hair, brown eyes, and a muscular physique.
Han Jisung has black hair, brown eyes, and a muscular physique.
Lee Felix has shoulder-length blond hair, brown eyes, and a muscular build.
Kim Seungmin has black hair, brown eyes, and a muscular build.
Yang Jongin has regular-length black hair, brown eyes, and a muscular build.
They are all quite strong physically, intelligent, educated, and also skilled fighters. After the zombie apocalypse began, the guards at the imperial family's palace were infected, making the palace unsafe and the Imperial family forced to flee. It was no accident that the princes and the Emperor were studying in the hall. They hid in different places. About two months had passed since the apocalypse began.