Transmigrating into Demon Slayer: Platinum Star from the Start

Fujimoto Shun, a young JoJo fan, unexpectedly transmigrates to the world of Demon Slayer. But as a 21st-century boy, he doesn't fit into the society of that time, and faces all kinds of discrimination and rejection. Just as he loses heart, a kind family takes him in. But his peaceful life is destroyed by demons, who wipe out the entire family. From then on, Fujimoto Shun sets out on the path of hunting demons.