Toaru Majutsu no Index - Volume 18, Chapter 5: The Mercenary and the Knight’s Encounter and Clash. Another_Hero.

An 18-year-old poor college student tried to apply for a job as a tutor but his life almost ended as demons' meal. In his last breath, a mysterious woman gave him a strange power. When he opened his eyes he had turned into a demon with a system that would turn him into… A pervert.

Now he must lived with his dual identity as a model student named Ethan and an incubus named Damian.

Kael, a former professional player of “Netherworld’s Gate” club, crossed into the game before it launched and became a Mixed-Blood Succubus. However, Kael always felt there was something not quite right about the way he raised the Fourth Calamity(player) as leeks for harvesting. Other NPCs’ methods of reaping players’ leeks: Unfathomable strength, top-tier plot backgrounds, hidden stories, and various skill teaching methods. His own method of reaping players’ leeks: An innocent yet desirable face, a small pink tail, eyes emitting hearts, skills with off-the-charts glamor… along with a turn-back-and-smile from the game’s promotional video. Wait a second, did I get something wrong with my great adventure in the game world? This book is also known as: “Succubus Reincarnation: Show Your True Skills in The Game World”, “The Common Succubus’s Cultivation Method”, “My Succubus Growth Monogatari is Surely Problematic”!!! Keywords: 【Fourth Calamity】【Kindombuilding】【Lord】【Dungeon】【Player】

Two Zatarian youths embark on a cross-dimensional journey to uncover their true identities, encountering both allies and formidable adversaries along the way.They must collaborate to decipher the significance of the symbol imprinted on them, but a faction known as the Nitharians seeks to eliminate them before they can uncover the truth. Naburo, the leader of the Nitharians, has dispatched his most trusted son and his team to guarantee the success of this mission.Will Naburo's son and his team prevail before the Zatarians discover their true selves?

The servant looked at the grieving princess. “Your Highness, the Regent Prince sent your scholar fiancé to the Western Butcher’s daughter!” 

The princess gritted her teeth, speaking to her servant that it matters not as she has other suitors in line. Many days later, much to her dismay, the servant ran in a hurry. “Your Highness, the Regent Prince expressed his intention of becoming your suitor! All other men in line were sold to Gou Lan Red District!”

The princess was distressed. She said to her servant it matters not. She’ll soon be married to Prince Fuma. Then the uneventful came. The servant once more ran to her, almost tripping in the process. “Your Highness, Prince Fuma was imprisoned at home! Meanwhile, there’s a red sedan chair waiting at your residence for your marriage! It was led by the Regent Prince!

The princess was stunned. For a day such as this to come, it seemed impossible. This nothing but a sad story of a female boss crossing back in time to hold the thick thighs of the big boss. But while raising him, she was eaten in the process.

- Description from Novelupdates