Cthulu

Ryder is getting tortured by Mary while Zoe fights with Vincent. Meanwhile, Cleopatra and Luna resolve their issues and agree to share Luna's body and cooperate with each other. They come out of the broken building to see what is happening outside.

Suddenly, black clouds appear, heavy rain starts falling, and the clouds start thundering. The sand on the beach starts to rumble, and thick fog covers the beach city. Music starts playing, and six giant rocks appear out of the ocean, each with a mermaid sitting on it, singing as if they were welcoming someone of great importance.

Everyone around the beach, including all the zombies and survivors, is captivated by the music and starts staring at the fog. A sudden tornado starts forming on the surface of the ocean, and the silhouette of a giant man with an octopus as its head can be seen through the fog. The giant man suddenly roars, and all the mermaids faint and fall back into the ocean. All level 1 zombies in the vicinity explode.

The WZCD is shocked to see what this giant kaiju-like monster is, and they identify it as a lvl 5 zombie. They name this potential disaster "cthulu" after the mythological sea monster. While Cthulu loiters around the beach city, three more lvl 5 zombies appear all over the world.

The WZCD informs the government of each country that their previous information about level 5 zombies was incorrect. It turns out that once a zombie evolves to a lvl 5 zombie, they turn into some kind of mythological creature with great strength and supernatural powers, making them a global threat.

Vincent, as the general of 5 ZEUs (zombie extermination units), calls every ZEU to subjugate the giant monster, Cthulu. Luna takes this chance to take both the injured Ryder and Zoe and escape, while Mary and Vincent are occupied with the monster.