MTL - This Infinite World is Shameless - Chapter 1580

Beings that create and control monsters and demons, beings that build and reign over malicious labyrinths, the chosen individuals to possess an overwhelming Unique Skill… They are the Demon Lords.

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

Death is only the beginning….He is the boss of a small bar. Despite his gentle and amicable appearance, he is actually cold and detached. He was born with the ability to communicate with spirits but sealed it away, unwilling to get involved with the supernatural.She is a rather unqualified lawyer. Timid as a mouse yet hates evil with a passion. Her birthdate is inauspicious but she’s also blessed by Buddha.A weird and bloody case forced them together. Her cases grew more and more dangerous while his sealed abilities awakened and grew stronger. They were initially repulsed by each other, which turned to understanding, getting along, cooperating, and finally a mysterious yet fierce attraction. With the help of a friend, the two of them solve the city’s horror stories one after the other.