World-Hopping Stand-In: From the Start, I Speedrun the Nine-Tails' Night!

After transmigrating into a crossover world, Tsukasa Jinguuji unexpectedly activates a Multiverse Stand-In System.

As long as he completes a stand-in mission, he can earn rewards and bring them back to reality?

In the Naruto world, he takes over Minato Namikaze's body.

"You can stop hiding, Obito. I know you're not dead."

In the Demon Slayer world.

The Flame Hashira is fighting Upper Rank on the Mugen Train, on the verge of falling in battle.

"Watch closely. This is what the sun looks like!"

Fate/Zero

Kiritsugu Emiya is plunged into despair as he faces the corrupted Greater Grail.

"A curse of this caliber isn't even worthy of being a snack!"

When Tsukasa Jinguuji returns to reality with a full set of divine gear and all his rewards.

Yukino Yukinoshita: "I'm grateful you saved me, but I never said I'd repay you with my body!!"

Megumi Kato: "Tsukasa... You really do seem to be able to do anything."

Yomi Isayama: "Senpai, about this A-rank evil spirit..."

Tsukasa Jinguuji yawns. "A-rank? Perfect. I can try out the ninjutsu I just learned."

The regrets of countless worlds will all be smashed through by my own hands!

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