Only Sense Online - Volume 3, Chapter 2 - The Library and Linguistics

Humanity had finally ended the war with the Demon Race and sealed them away, forever.However, they now have to face the treat of the Shadow World, an equally dangerous threat to their civilisation under the rule of the Emperor!Facing only misfortune from a young age, Nikolaus Reinhardt never expected anything good to happen to him.But his world completely changed when he awakened as an Ascendant, and accidentally summoned a member of the Demon Race in his house.Just because he messed around with a god damn book!

Sa Bina was on her way to write her SAT when she suddenly finds herself in a strange world. She is sent to be the old emperor’s concubine, but on their wedding night, the emperor gets murdered by no one other than his own son and the heir! To survive, Bina makes a deal with beautiful but deadly Lucretius and her life in this dangerous kingdom begins.

This novel is also known as Master Fu's Mysterious Darling Wife

She is the The Young Miss of Military family Shen, her face is peerless, her temperament is cold, and she is her family’s treasure, but isn’t accepted as one’s child by her mother;

He is The Sole Heir to the top giant Fu Family, his power is unparalleled, indifferent high-born, the captain of the mysterious military force, and the youngest commander-in-chief.

Because of her grandmother’s wishes, she married him at lightning speed. She thought that it was a marriage that she needed, but she didn’t expect to be greeted with his extreme pampering.

- Description from Novelupdates

SynopsisElian was once a healer—a rare one. His body fluids could cure any wound, and because of that, he was treated not as a person, but as a tool. Abused and violated by both men and women in his own guild, Flameborne, he endured unspeakable horrors in silence. In their final battle against the Demon Lord, they abandoned him like discarded trash.But death was not the end.The gods took pity. Reborn as Caelan Virelith and blessed by a goddess, he awakens in a new world with a powerful gift: the ability to form Essence Links—magical bonds forged through intimacy that unlock skills, power, and potential. Still a healer, but no longer powerless, Caelan begins his journey not only to grow stronger, but to hunt down those who broke him... and make them kneel.This time, he decides who gets saved.--Content Warning:This story contains mature themes, including sexual content, abuse, and revenge. It is intended for readers 18+ only. Reader discretion is advised.