I Became the Youngest Disciple of the Martial God - Chapter 74

This is the story of a boy who lived a secluded life in the mountains, tending his farm, rearing his fish, and dreaming his dreams. Eh? Did I suddenly conquer all worlds and become the big boss? Or am I still in a dream?

- Description from Novelupdates

“I am an evil god. Would you like to make a contract?” In “Phantom Heroes Online,” a VRMMO where in-game currency can be converted to real money, a man, worn out by society, decides to quit his job and earn a living through gaming. In this fantasy world of swords and magic, players contract with advanced AI NPCs, aiding and nurturing them. The protagonist, Zephyr, whimsically tells a young girl a lie, claiming to be her savior. Believing Zephyr to be the “god who rescued her from despair,” the yandere girl transforms into the formidable “Reaper Loli,” a top-tier berserker feared as the “Fanatic” across the continent. She rises to become one of the game’s top players, dominating the leaderboards. Unbeknownst to Zephyr and the other players, their actions in the game are actually leading to saving of another world.

The dominant forensic doctor who traveled back in time to the era of the Great Tang's Zhenguan reign, became a distinguished family's abandoned girl.