Dimensional Descent - Chapter 5: The Incident

When he woke up, Rono traveled to the world of pirates.

I thought I could live happily and peacefully.

But the appearance of Tianlong people broke this situation!

Rono, watching his parents being shot to death by Tianlong people!

Under extreme anger, Rono awakened the system and vowed to kill all the Tianlong people!

From then on, a [Extremely Evil One] who specialized in hunting Tianlong people was born!

Wherever Rono went, the Tianlong people shivered!

Admiral?

Two more and I will kill all of you rubbish!

Karp: The Evil One?

He is a monster created by the Tianlong people, and one day the Tianlong people will pay for it!

Roger: 【One Piece】?

Compared with [The Evil One], it’s nothing but a cloud!

Whitebeard: [The strongest man in the world]?

No, no, Rono is the strongest!

Rocks: In terms of killing Tianlong people, Rono is the first, I am second, everyone else is garbage!

- Description from novelbuddy

Yong'an City Publicity Department:“Once again, we remind all citizens that a Level 4 Demon Nest has appeared outside Yong'an City in recent days. Currently, it is being suppressed by a team led by the President of Huayan Martial Arts University, [Dragon-riding Guanyin·Zheng Yulan].During this period, the municipality urges everyone not to travel at night unless necessary! Life first, safety most important!”The appearance of the Celestial Demon disrupted the world's original progress, with technological innovation no longer leading the mainstream, and Martial Arts exploration taking the global stage.Day Character Punch, Eight Steps to Catching a Cicada... many ancient martial arts have been continuously studied and innovated, evolving into Cultivation Techniques better suited to contemporary people's physiques.Nine Paths of Qi Blood, Eight Great Restrictions, Martial Arts practitioners gather immense power, only the Martial Arts will can suppress Celestial Demons and shatter darkness!Tianshan Mountain Martial Arts Conference, River Gathering, the world's number one Martial Arts tournament! All for the sake of determining the strongest Martial Arts practitioner to lead the world in safeguarding our civilization and homeland.“Here's a piece of good news: our country's [Great Saint Zhao Linyuan] has once again won the top spot in the world's number one Martial Arts tournament! This further cements our country's dominant position in the global Martial Arts development arena.”“Zzzzz...”Meng Chuan turned off the television and, as usual, practiced the [National Obligation Basic Boxing]【National Obligation Basic Boxing: Perfection (99%) Awaiting Limit Breaking】【Limit Breaking Feature: Once Proven, Forever Proven (Super) Awaiting Activation】

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates

The world was once at war with 10 alternate worlds. This was known as the Concept War and our world won 60 years ago. All of this was concealed so no normal people are aware of this fact in the current time.

After the death of his grandfather, the high-school student Sayama Mikoto is suddenly summoned by the giant corporation IAI. He learns this world is headed for destruction due to the acceleration of the Minus Concepts. To prevent this, negotiations must be undertaken with the survivors of the other parallel worlds so their 10 concepts can be released.

And so Sayama is caught up in the final battle to clean up after the Concept War which left behind so much enmity.