The story is about a guy who gets transmigrated to a world similar to Earth, the key difference is that in this world they've never experienced World Wars due to having an abundance of resources and thus have greatly advanced in technology compared to Earth. Because of this, many of the people residing in it have come to eventually ask for war because there's nothing much else to do. To placate the people, the federations/governments of the world started a convention/festival hundreds of years ago that promotes anti-war, and now it's become a staple of the world every year.

The MC transmigrates into the body of a man not too dissimilar to him that was planning to make a game for the upcoming anti-war celebration. But for a certain reason had his game stolen by a larger, more powerful company. Due to this, the MC has to come up with a completely different game just a few weeks away from the start of the celebration. So, you may wonder, how exactly does he solve this? Of course - through a sudden appearance of a system (yes, a system. But don't worry, it's presence in the plot isn't too overbearing). With this system, the MC can basically transfer what happened on Earth to this world. And boy, is it a sight to see.

I find the reaction of the citizens of this world to the things that happened in World War II to be an absolute banger of a theme in this novel. Seeing the tiny, mini-plots that happen to people as they explore Earth during World War II feels completely fresh and astounding to me. Like, I've seen other novels have plots and sub-plots that play into livestreaming, online media, and online reactions, but I've never seen one that was this extensive. Truly, it's a wonderful read.

It shows why those people who ask for war are completely out of their minds or just plain ignorant by showing both the people of this world and the reader themself what war can take from you. Hell, I'm not even sure whether they'd show the holocaust or not with how realistically they portray WWII. And usually, you would never think they'd show the holocaust, but this novel? I think there's a serious chance of it. And I think it wouldn't just show it; it'd show it as most objectively and respectfully as it can.