Starting as a Son-in-law to Establish an immortal Family - Chapter 1850 - 618: Nascent Soul, Dao Transformation, Journey to Yue Country

I became the Heavenly Demon’s dog.

Notice: This story contains R18+ themes, including violence, sensual and sexual content, blood-related addiction, and dark psychological elements. Reader discretion advised.I died in a library, crushed under centuries of forgotten knowledge. Fitting.Now I’ve woken up in a coffin, starving, undead, and very much not human.They call me a Fledgling—a bottom-feeder vampire barely above a ghoul. I’m weak, hunted, and tethered to a world straight out of a cursed tabletop campaign. It’s a classic fantasy realm—elves, knights, guilds, and dungeons—but twisted by a dark, rotting magic. The moon shines red, the gods are silent, and every town smells like fear.To make matters worse, I’ve been bound to a LitRPG system called the Blood Codex.Level up by draining blood.Unlock skills by embracing your monstrous nature.Resist Corruption... or don’t.There's no prophecy. No chosen one nonsense. No noble title. Just fangs, rot, and whatever I can steal, trick, or kill to survive.But the deeper I sink into this world’s underbelly, the more I realize something is watching me through the system. The rules are breaking. Dungeon bosses are going mad. Entire towns are disappearing.And I think I’m supposed to fix it… or maybe finish the job.

In the blood-soaked shadows of Ancient Japan, one name struck terror into the hearts of daimyō and demons alike.Akira Minato, King of the Shinobi.He slaughtered ten thousand Taira Samurai with his bare hands.He burned Demon Temples, butchered Shoguns and painted shrines with their entrails.He was the true legend of Japan, the nightmare everybody prayed to be delivered from.One quiet night, while chasing a mysterious treasure, he stumbled upon the Ultimate Oni. His escape plan backfired, and he was forced to seal it with his own soul, accidentally dying in a so-called “glorious sacrifice.”And then he woke up in 2025 Tokyo.In a teenage body.Wearing cat-print pajamas.With his powers sealed.And outside, monsters were growing more aggressive.JINKOKU, the Monster Hunting Authority of Japan, was recruiting anyone who can fight them… even if they keep asking dispatch for backup to fight 'those cursed giant centipede monsters under the station.'With no powers, no money, and no way home, Akira Minato had no choice but to take up the blade once more, this time as a registered monster hunter.He would reclaim his strength, find a way back to his era, and if fate was merciful, win the heart of the girl who looked exactly like the one he failed to save.Same voice. Same face. Same name: Princess Yuki.He was once the hegemon of the ninja world.Now he’s broke, underpaid, and hopelessly in love with the nation’s Princess.But even in this ridiculous age…You will call him Shinobi-sama.

Loose cultivator Shi Lang gradually found himself in the realm of invincibility. However, when he finally tried to ascend to the higher realm, the spirit of the world was nearly exhausted.

So, between his ascension to a new world or the well-being of his home, he chose the latter and sacrificed his life to save the world.

Nobody knew what he gave up for the world, and he told no one.

Although his sacrifice had gone unsung, there was still someone who witnessed everything. A treasured artifact he carried on his body preserved his soul and let it escape a tragic end.

Eons passed.

The human race stepped out from the age of cultivation into an age of stellar conquest.

The spirit energy in the world was now scarce, but humans found other means to excel.

In this highly-advanced time, Shi Lang's soul has found a chance to be reborn.

What happens when an ancient cultivator that neared the level of a deity before his first death gets a second chance at life in the space age?