Reincarnated: I Was Just a Bystander, but I Defeated the Demon King

[Japanese-style fantasy + tides + sword and magic + character growth + slow burn]

Aoki transmigrates to another world and becomes an ordinary background character.

He had planned to lie flat and wait for the tide to pass, but someone tried to assassinate him for reasons unknown.

After learning the truth behind the assassination, even a background character like him has no choice but to take up arms and find a way to survive in this otherworldly land.

He changes class and retrains as an adventurer, leveling up relentlessly in an attempt to catch up with the heroes. He forms his own adventuring party and takes on the subterranean labyrinth.

When the gates of the heavens open one day, Aoki finally realizes that the adventuring party he pieced together as an ordinary nobody has grown far stronger than the heroes’ party.