Maou-sama no Machizukuri! ~Saikyou no Danjon wa Kindai Toshi~ - Volume 9 Chapter 7

A fluffy, sweet modern GL story about a mature older women and a cute university student.

“When the old gods are forgotten, they do not die—they wait.”In the year 1025, the Viking Age wanes.Iceland bows to Christ. The Althing governs by law. And the gods of old fade to whispers.But in the far Westfjords, something stirs.Vetrulfr, a former Varangian captain and exile, returns from the East with foreign gold, forgotten warcraft, and a hunger no man can name.He comes not in peace, but to raise Ullrsfjörðr from ash and ice; building walls, carving runes, and waging war on behalf of a dying faith.From Reykjavík to Aachen, rumors spread: a ghost walks the North once more. Some call him the son of Ullr. Others, a wolf-cloaked demon.But all will know his name.and when the Valkyries call, he will answer.

Read the first 10 chapter and you will like it..All of humanity—billions of souls—were forcibly transported into 《Global Lord》, a merciless game-world where each person becomes a Lord and must fight to survive. Most cried. Most begged. Most died.But Lucas Nightveil was different.A war mongrel with a thirst for carnage, Lucas thrived in blood and madness. While others struggled to build wooden huts and gather firewood, Lucas awakened the [Dark Crypt]—and with it, her.Selena Draculea, the Vampire Queen. Elegant. Overpowering. Sadistic. And above all—loyal only to her King.While the rest of the world was still learning how to train peasants, Lucas was already unleashing Death Knights, Blood Moon Archers, and Shadow Banshees from his evolving Lair. With Selena by his side, he painted the lands crimson with the blood of Lords, monsters, and gods alike.He didn’t want peace.He didn’t want justice.He only wanted war.“In the night, there is no mercy—only my will.”— Lucas NightveilAs his Night Empire rises, the world learns one eternal command:“Bow to the Vampire Queen. Or be devoured by her King.”

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