its an animated zombie movie with a red necklace related

A strange virus turns 90% of the world population into Lust eating Zombies. However, in Akihabara, Japan, some males were found to be uninfected. These men team up with the Zombies to go after the flesh and blood of surviving young women to fill their lust. The women survivors must fight to survive in an apocalyptic Japan.

It is about Mao Shanhao leading his apprentice Qiu Sheng and Wen Cai to open a shop and run a monster in Qinglong Town. Wen Cai asked his elder brother for help from marrying his daughter, and Qiu Sheng took the risk to find the legendary Huang Yao to borrow money. One person and one demon didn't know each other and had love. Despite the obstruction of Mao Shanhao, the captain of the public security team in Qinglong Town, Hu Biao, insisted on putting an ancient holy relic in the exhibition of the World Expo. Mao Shanhao came to the rescue but was completely secretive, making the evil spirit escape and blood-washed the World Expo. Mao Shanhao led the battle, but he was not an opponent. When the crisis happened, Huang Yao appeared, sacrificed himself to remove the relics, and saved the people of Qinglong Town

In a world ravaged by a virus infection, turning its victims into the Undead, Alice continues on her journey to find survivors and lead them to safety. Her deadly battle with the Umbrella Corporation reaches new heights, but Alice gets some unexpected help from an old friend. A new lead that promises a safe haven from the Undead takes them to Los Angeles, but when they arrive the city is overrun by thousands of Undead - and Alice and her comrades are about to step into a deadly trap.

The gruesome Nazi Zombies are back to finish their mission, but our hero is not willing to die. He is gathering his own army to give them a final fight.