My Brother-in-Law Is Reborn with a Greatsword

[One Female Lead + No Harem + No System + Apocalypse + Sweet Romance]

Does the protagonist have to be reborn? No, not at all. Do you need to stockpile supplies for the apocalypse? No, not at all.

Come experience a different kind of life in the apocalypse. The end of the world is both a disaster and an opportunity! In these chaotic times, join me on the battlefield as we conquer new lands and take Japan... Charge!

P.S. The first 50 chapters set the stage. After that, we’ll head to Japan.

This story is a little sweet and a little thrilling, so get your insulin and blood pressure medication ready. Let’s go!