Demon Slayer: Starting with Sukuna's Powers, I Terrify Muzan

Tomioka Yoruha transmigrates to the Taisho era and witnesses his family being brutally slaughtered by a demon.

Just as the demon opens its bloodstained maw, a system activates!

[Supreme Villain Template Roleplay System activated!]
Starting template loaded: Ryomen Sukuna, the "King of Curses"!

"You call this a demon? It's nothing but inferior trash."

With a slight twitch of his fingers, invisible slashes instantly carve the demon into countless chunks of flesh! Infused with a curse upon the soul, his attacks completely nullify the regeneration demons take such pride in!

After he joins the Demon Slayer Corps, everything takes a very different turn.

When he encounters Upper Rank Three, Akaza, the demon laughs wildly. "Your fighting spirit is powerful. Become a demon!"

Yoruha breaks into a crazed grin as eerie black markings spread across his face. "Too weak. Trash like you doesn't even deserve to amuse me. Domain Expansion-Malevolent Shrine!"

That night, invisible slashes reduce the entire mountain peak-and Akaza along with it-to dust that fills the sky.

Inside the Infinity Castle, Muzan Kibutsuji watches the images relayed through Nakime's vision. His entire body trembles. He doesn't even dare to breathe too loudly.

"Who was it? Who unleashed this monster?!"

[Slow-paced story. Watching Demon Slayer lately has been absolutely heartbreaking, so I'm starting this novel to make up for some of those regrets.]