Dice In The Darkness: Cthulhu Calls - Chapter 10: The Beginning!

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

While I was reading the first volume of “Danmachi,” I suddenly felt my cock grow. It grew so much that it started to hurt.Suddenly, my sperm gushed out. Before I could understand what was happening, I realized I was in a familiar place.

The world spat on him because he betrayed humanity and took the side of darkness.His executioner was his best friend and his lover stood on one side, her eyes hollow and devoid of any sympathy.Every single one desired him to vanish.However, the moment his pitiful life came to an end he found himself getting summoned by a Goddess.Kneeling on the ground and requesting for his help,[For the last time, please wear the mantle of our champion again. This world needs you, Clarsen.]So she said.The world would be pushed under the darkness of death again, and this time there would be several chosen warriors there to save the world.Yet, despite all that, the eldest Goddess was begging for his support.“Fine, I will do it myself.”********Additional tags: Strong to stronger, ruthless MC, kingdom building, limitless mana, possessive characters, regressor, transmigrator, obsessive love.*********A/N:- Give the story a read until it goes through a time skip. I request you to pass the judgment after that.

On the wedding night, she was tied to his bed.