Glutton Berserker ~The One That Exceeds The Concept Of Levels~ - Chapter 161 – Hauzen Underground

He lived from BC to the Middle Ages, from the Renaissance to the Industrial Revolution, and from Cyberpunk to the Interstellar Age. He has been a king and a prophet, a knight and a nobleman, a versatile artist, a genius inventor…
This is a four-thousand-year human epic——
“To us four thousand years from now:
“Is the world at peace? Is famine extinct? Can people touch the stars? How long is the human lifespan? How far is the boundary of the earth? Human…do you remember us?”
——Excavated from Earth Age Tenth Century BC, Solomon Prayer Book.

- Description from novelbuddy

Leila's, the daughter of a powerful Alpha, is cast aside by her father after being born as his first child. Disappointed that she cannot inherit his title, he sacrifices her to settle a debt with a notoriously brutal rival pack. Sentenced to a life of slavery, Leila's is subjected to unspeakable cruelty, her spirit hardened by the abuse she endures.Driven by a thirst for vengeance, Leila's vows to reclaim her honor and seek retribution against her father and her captors. Her life takes a turn when she escapes her torturous existence and encounters her destined mate. He introduces her to a world of love, protection, and comfort—a stark contrast to the harsh life she has known.With her mate’s unwavering support and the skills he helps her acquire, Leila's transforms from a mild, innocent young woman into a formidable force. As she prepares to exact her revenge, she grapples with the darkness within her, ultimately seeking to quench her thirst for vengeance while navigating the complexities of love and power.'Turning Dark' is a gripping tale of betrayal, transformation, and the quest for justice as Leila rises from the ashes of her past to become a force to be reckoned with.

Based on the popular Vocaloid song .

Rin, a young angel (presumed female, but angels don’t have clear genders) falls in love with a young human girl, Miku. However, their love is considered taboo, and so, Rin makes a deal with the devil to be reborn as the human boy, Len, in order to be with Miku. However, their happiness together is short-lived, and even that soon ends in tragedy.