My Identity as the Zombie King Was Discovered by My Sister

Traveling through the Zombie King, his identity was discovered by his sister at the beginning, and he swept all directions along the way, and all countries surrendered. The protagonist is a time traveler who acquires a system and begins to hide his identity, and then is exposed bit by bit. Everyone is shocked and becomes the most terrifying existence in the world of monsters. All forces want his protection, but no one knows This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.