Main character Yoshio thinks he's beta testing a new computer game, but the characters are so real, and there's the warning that came with the warning to keep quiet about this game; if all his characters die, it's game over, for real.
It really feels like an isekai, but the main character never stepped over that door to the new world, but instead is stuck in the mundane world, where he has to keep on living as a recluse in his parents' home, a man beaten by society, someone the Japanese call, a hikikomori.
It is really interesting to see what would happen next in this villager simulation, and what the main character would do to keep the game playing. See how Yoshio, little by little, overcome his social anxiety, so that he could earn the cash to spin the gacha element in the game. When you see gacha, and pay-to-win elements in a game, this is definitely a story written by a Japanese author. As Yushio slowly integrates back into society, he gets to find his footing, and it really helps that his family is supportive. As a reader, you get to cheer both for Yushio and the village he is building in his game.
