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.