Anime Crossover: Swordsmanship Master Starting with Demon Slayer

After transmigrating into the world of Demon Slayer, I awaken the Infinite Proficiency System. I can only transmigrate to other worlds by growing stronger without stopping.

Demon Slayer, Attack on Titan, Akame ga Kill!, Naruto, One Piece…

Breathing Styles, Demon Slayer Marks, and the Transparent World are strong? Ever heard of Kenshin?

I transmigrated two years before the story begins. I kill an Upper Rank demon for fun now and then, clear out the demons on Mount Fujikasane, and become Sabito's idol.

By the time the story begins, I've already brought the Demon Slayer Corps to the Infinity Castle.

Qin Feng: "Kibutsuji Muzan, quit hiding and come fight me!"

Muzan: "Could it be that another Yoriichi Tsugikuni has been born? Do I have to hide again?!"

This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.