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

Whoosh, bang, boom~ A strange meteorite hurtles toward the ninja world from the depths of space. As it passes the moon, Otsutsuki Toneri controls the giant Tenseigan and unleashes the Golden Wheel Reincarnation Explosion, successfully shattering the bizarre meteorite. Whoosh~ Although the meteorite has been reduced to fragments, the special virus it carried has already spread through the air across the ninja world. Crash~ A black rainstorm soon sweeps across the entire ninja world. Anyone caught in the rain receives an incredible boon, but it comes with an exceptionally high risk, and ordinary people can hardly handle it. Those with frail constitutions soon begin to show symptoms. They mutate into terrifying zombies, madly biting everyone and every animal around them. Those with powerful physiques and strong wills manage to resist the virus and even evolve all kinds of new abilities. The door to a new era swings open, and the age of the ninja is over. First-tier zombies are the most common. They were ordinary people in life, with no chakra at all. Aside from immense strength and endless stamina, the only way to kill them for good is to destroy their heads. Second-tier zombies possess chakra and are about as strong as Genin. Besides destroying their heads, you can also rip out their hearts. Removing the crystal core 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 on the level of the Super Kage. Tsunade had been eating, drinking, and making merry in Tanzaku Town, but then her maid Shizune and pet Tonton both turned into zombies. With no other choice, she had to bring herself to kill her former companions. That even cured her hemophobia.