A Record of a Mortal’s Journey to Immortality - Chapter 12 - Breaking the Bottle

Luo Zheng is at the bottom of the Luo Clan hierarchy, despite his family being the founders of a power refining technique that could instantly defeat any opponent.

One night, enraged by unfair treatment from a family steward, Luo Zheng burns the family records. In doing so, the hidden magic in the book engulfs him and Luo Zheng becomes a new skilled fighter. Fleeing his home and despicable clan, Luo Zheng must learn to harness his powers to rescue his younger sister while his own cousins are on his pursuit.

- Description from Novelupdates

My name is Joo In-gong. The name that my parents gave me meant ‘protagonist’ of the world. Really?

“I'll do it. I'll do anything you want”Raiden clicked his tongue in a disapproving tone then raised Hiro's head once more.“That's not what I want to hear, Hiro” He said. “I want to hear you say it with your lips. I want to hear you acknowledge what you will be to me and your status from this day henceforth.”He stared deep into Hiro's beautiful brown eyes as he spoke; “Say that from this very second, you belong to me. Your body, your soul, your mind, every part of you belongs to me. You will be my pet and remain by my side. You will do whatever I ask you to do. Tell me that I own you, Hiro.”Raiden's voice was frighteningly deep and Hiro felt shivers run down his spine. There was nothing he could see but Raiden's smokey grey eyes, his handsome face and that devilish smile that gave him goosebumps and made his heart tremble with fear.With tears running down his cheeks, he balled his fists and spoke softly; “I promise, Raiden, from this very second, I belong to you. Every part of me is yours. My body, my mind, my soul, everything is yours. I will be your pet. I will do anything you ask of me. I will give you everything that I am. You own me, Raiden.”Watanabe Hiro used to be very rich. As the last child of the Watanabe family, he was pampered and spoilt by everyone but he was a good kid. He was obedient and friendly. Nice and very caring. He never did anything to worry others. He also had a lot of friends. Some were with him because they genuinely liked him while others were with him because of his wealth. That is, until a calamity befell his family and everyone he considered a friend abandoned him.Hiro was forced to live a wretched life for 4 years until he met a former senior who was ready to save him but under one condition.Hiro had to become his for a year.

I became a mage character from my favorite game.