It's a crossover anime/manga series, not featuring a single female protagonist. It's similar to Ultraman and includes content related to Your Name, Kaguya-sama: Love Is War, Lonely Rock, Oregairu, and more.

Zuo Zigong traveled through time.

Liben has traveled to a parallel universe.

He transmigrated into the body of a handsome Chinese man studying in Tokyo.

In this special parallel universe, there is Shuchiin High School, Sobu High School, Itomori Town, Shinomiya Foundation, the End Band, and many, many other things that once only appeared in anime.

This seems like a good start?

However, at the same time, Zuo Nong also received a legacy from an extremely ancient civilization.

From this legacy, Zuo Zigong learned...

The world-destroying monsters are about to arrive one by one, and he will need to transform into the final giant to fight them.

The snake has lived for twenty-one years, and its whole body is more than one meter long when stretched out.

This was already bigger and longer than the mother it remembered.

After the last brother dies of old age, the snake will gain a power for every additional year it lives.

In the first year, it acquires the ability to think.

In the second year, it was inexplicably able to understand human language.

In the third year, it got the death cycle...

As long as it keeps on living, it can keep getting stronger.

The snake began to chase its own road to immortality.

[Godslayer + Ironclad Element + System + Two Male Protagonists + Perfect Ending + Parallel Storylines]

When a shooting star streaked across the sky, I made a wish: if there truly is an afterlife, I hope to have a healthy body so I can travel the world freely.

And so, at the age of eighteen, I left this cruel world, afflicted by illness, and my soul entered a world called Godslayer.

Updated irregularly every day