Saving 80,000 Gold Coins in the Different World for My Old Age summary: William is the lone human in a city of the dead. Born with vague memories of a past life in contemporary Japan where he failed to do anything useful, he is determined not to make the same mistake again, and that this time, his life will be lived. But what does that really mean? Raised by a group of the undead, William must discover what circumstances brought him to this city and these people as well as what it means to not just exist, but to live a full life.An 18-year-old girl who lost her family in an accident, Yamano Mitsuwa falls off a cliff one day and transferred to a different world with a civilization level of medieval Europe. Mitsuwa who discovered it was possible to go and return to Earth after a deadly fight with wolves decided to live in both worlds. 「For security in old age, I will aim for 80,000 gold coins!」 I will try not to let strange things circulate to not distort the progress of the world, but I won’t hold back for the sake of my easy life and safety! While wearing three handguns along with words and deeds that appear decent, in her head Yamano Mitsuwa is a sly girl. Making an effort to make money even with a small body that looks like a child to Westerners! Oh, my secrets are too dangerous, is that so? It’s all right, it’s fine! I’ll teleport away when push comes to shove!