Apocalyptic Naruto: From the Start, I'm Protected by Yandere Tsunade

Whoosh, bang, boom!

A strange meteor crashes toward the ninja world from the depths of space. As it passes the moon, Otsutsuki Toneri uses the giant Tenseigan to unleash the Golden Wheel Reincarnation Explosion, successfully shattering the bizarre meteor.

Whoosh... whoosh...

Though the meteor has already been reduced to fragments, the special virus it carried has spread throughout the ninja world through the air.

Splash!

A black rainstorm soon sweeps across the entire ninja world. Everyone caught in the rain receives an enormous opportunity, but it comes with extreme risks, and ordinary people can’t handle it.

Those with frail constitutions soon begin to show symptoms, mutating into terrifying zombies that madly bite everyone and every animal around them.

Those with strong bodies and firm wills, however, resist the virus and even evolve all kinds of new abilities. The door to a new era opens, and the age of the shinobi is over.

First-tier zombies are the most common. They were ordinary people in life and didn’t even have chakra. Apart from immense strength and endless stamina, they can only be killed for good by destroying their heads.

Second-tier zombies possess chakra and have roughly the strength of a genin. Besides destroying their heads, you can also rip out their hearts. Removing the crystal cores from their bodies will kill them as well.

Third-tier zombies have the strength of a chunin, fourth-tier zombies are as strong as jonin, fifth-tier zombies have Kage-level strength, and sixth-tier zombies are stronger than Kage.

Tsunade had been eating, drinking, and having fun in Tanzaku Town, but then her maid Shizune and her pet pig Tonton both turned into zombies. Left with no other choice, she painfully killed her former companions. It even cured her hemophobia.