Could it be that I am the cruel villain? - Chapter 705 - 406: The Crisis at the Border

Masterpieces such as 'The Divine Comedy', 'The Theory of Evolution', 'Encyclopaedia Britannica', 'The Theory of Relativity'...Born in the history of human civilization, possess mysterious and magical powers in another world!Original sin, biological evolution, mastery of all arts...By reading the secret tomes, one can gain a variety of powers!The only trouble for the people of the other world is that they find it difficult to understand the texts from Earth.At this time, there comes a librarian from Earth...

Trust me, this is not your regular repititive smut romance;When Benjamin Mark dies a lonely virgin after a lifetime of work and illness, mischievous gods grant him a steamy second chance in the fantasy world of Elyndor.Reborn with a handsome new body, infinite stamina, and a cheeky System designed to help him “enjoy life,” Benjamin stumbles into the hidden paradise of Verdant Spire—an ancient forest enclave inhabited solely by fierce, voluptuous Amazon warriors.These proud women, who normally venture out only to seek temporary mates, have never allowed a man to live among them… until now.Rescued and claimed by the passionate scout Sara, Benjamin quickly discovers that his arrival is seen as a divine gift. With the System unlocking tantalizing new abilities with every intimate encounter, he becomes the cherished center of an eager, all-female tribe—from attentive warriors to the commanding Queen herself.In a village where strength, beauty, and desire rule, one reincarnated man is about to fulfill every unspoken regret of his past life… one breathless night at a time.A sinful isekai harem fantasy of reincarnation, endless stamina, and the ultimate male wish-fulfillment.

This world has Fox Fairies, River Gods, Water Monsters, Great Demons and Cultivators who seek immortality.