There was once a man who was summoned to another world, and saved it. Of course, he became too popular there, and turned into an isekai-norm...

There was once a man who was summoned to another world, and saved it. Of course, he became too popular there, and turned into an isekai-norm...

The story takes place in Japan. The year is 2030 and Earth has been completely overrun by a viral disease named "Gibia" that turns infected ...