She Lives Well with the Shopping App in the 80s - Chapter 641: Investing with Ambitious People

The ordinary world is not ordinary, ordinary people are not ordinary, and safe places are not safe.

This is a story of a passer-by male protagonist who is entangled by various girls with strange hobbies or even non-human beings while surviving in the cracks and opening a harem.

- Description from novelbuddy

One hundred fifty-eight years have passed since humanity first spread beyond the bounds of Earth. It has been two years since we made first contact with an alien race. Two years since the war began. A war we are losing.We have been driven back to our last bastion, Earth. Our colonies lie in ruins, our fleets decimated. Our enemy is at our doorsteps, and soon our fortress may fall, but we have one last hope. A new ship that may change the tide of this war, and provide salvation for our race. That ship is humankind’s first ship capable of breaking the lightspeed barrier and bringing the fight to the enemy. Will that ship be able to save our race? Or is she doomed to fail?Note: This is a rewrite of my Earlier work Nomads of Sol.

Reborn into the world of Yugioh, it's natural if my goal is to become the best duelist!