Real Man - Chapter 545:

[Linguistics Skill: Lv0 (7/10)] [Apothecary Skill: Lv1 (15/100)] [Knight Breathing Skill: Lv2 (36/200)] [Knight Breathing Skill Experience Point +1] ------ In the year 3077 of the Berta calendar, during the era of confusion before wizards had reached the throne, he brought them ’Straight A Student Panel.’ He stepped into the sorcerer world, perfected sorcerer knowledge, like a bright moon dispelling the mists of the era. He was Ivan Marichardon, a pioneer of knowledge, he blazed trails for the way of the sorcerer.

Summary Version 1:

The mysterious boy Ling Chen is saved by a little girl as he lay on the street dying. Years later, he strikes a deal to save this savior-turned sister and enters the virtual world. In a future Earth where advanced warfare has forced nations to settle issues virtually or else suffer the consequences, Ling Chen bursts into the scene and goes from unknown to legend. Yet all is not as it seems, for Ling Chen has a dark past, and there is a greater mystery at hand behind this virtual world.

Summary Version 2:

To save his terminally ill little sister, Ling Chen enters the newly released virtual game world and joins a small gaming studio comprising entirely of women. From now on walking upon his path towards the pinnacle. An ancient, evil item almost forgotten by history, the “Lunar Scourge” helps forge his unsurpassable legend, and causes him to unknowingly step upon a path that is destined to be punished by the heavens, the way of the shura.

He died on the wedding of the girl he had a crush on, after a long and successful career. After convincing Yama to send him back to the world, he decides to fix the areas in which his life went wrong. Realizing the lack of love and romance in his past life, he sets out to conquer the hearts of various women.

- Description from Novelupdates