Apocalypse Naruto World

A transmigrated person suddenly woke up in the world of Naruto on the same generation as Naruto. But he not out transmigrated but also a rebirth after going through 15 years of the apocalypse in the Naruto world. He has returned back just 1 month before the apocalypse. He originally thought that Naruto world would be fine and he can get some beauties. Unfortunately for him the plot did not happen in the way he wanted. There is a sudden sequence of tsunamis and the entire ninja world was submerged along with the deserts of the land of the wind in just a month. As soon as everything was submerged, every person in the ninja world has a blue screen in front of them saying that “Welcome to the apocalypse survival” Every person would receive survival points every day based on their survival situation of the past day. These survival points can be used to improve their physique, spirit, available chakra, chakra regeneration rate…….. What is the point of having bloodlines and strong Jutsu when they did not have chakra to use them? Even the ninja became lowly bandits conserving chakra and steal food and water…. The natural disasters continued from extreme heat, cold, insects, mutated beasts……..