Steel, Guns, and the Industrial Party in Another World - Chapter 279:

Kyo Mazuru traveled to the world of Bleach and landed in the forest of Menos Grande at the beginning.Picking up a asauchi left over from Shinigami's death, and starting with a sword, he spent hundred years in the forest of Menos Grande to survive, slashing countless hollows, and his slashing skills reached the peak, until one day, he met a man who claimed to be Mr. Aizen Sōsuke!Mr. Aizen couldn't bear him to live alone in Hueco Mundo, so he invited him out of there and brought him to Soul Society!After that, Kyo Mazuru's Shinigami career began!

I Became Hades, the God of the Underworld from Greek and Roman Mythology

In old times a boy named Luis had lost his parents at a very tender age, he never even got to know who his parents were. With his parents gone he had to be taken care of by his wicked aunt who hardly fed him once a day, in effort to get food Luis was adviced to steal by a strange book without minding the punishment of burning given to thieves. When Luis was caught he ran into the forest and the villagers including his aunt chased him down with torches.

“I think it's best I surrender now” Luis stopped running and was panting now.

“I think I can see him!” he heard the village blacksmith shout.

He took a little step backwards and down a hole he went.

“Noooooo!!!” Luis screamed as he went down the hole, the last thing he saw was a red glowing light and then it was lights out for him.

“What happened?” Luis groaned. “Where am I? And why is my body so cold” he said touching his arm

A screen appeard in front of him.

[ System revived ]

“What?”

That was where the true journey began.

Now the fate of mankind lies in his hands as he keeps completing tasks and quests to get stronger.

Luis keeps getting stronger but the question is:

Will he be able to stop Lucifer?

After an accidental death, in order to continue to live, Gu Bai had to choose to go through various wonderful books to complete tasks.

Every time he became a variety of small cannon fodder inside the story, Gu Bai’s code of conduct when completing task is – by all means, don’t be inferior, don’t be shameless, don’t be upright… hold on to a golden thigh.

… N times after transmigrating

Cannon fodder: (angry contempt) … You’re already so powerful, why are you still shamelessly holding on to a golden thigh to deal with us!?

Gu Bai: (deadpan) That… holding and holding… got used to it…

- Description from Novelupdates