MTL - American Warehouse Taobao King - Chapter 813 [Under this bunch of quack doctors]

A modern Japanese man reincarnated into a game as Welner von Zeavert. Though he reincarnated as a noble’s son, he is neither the main character nor the hero of this world. He become someone who didn’t even appear in the game.Plus, with only [Spearmanship] as his skill, he can’t even join the hero party to clear main story.His small advantages are the fact that he became the hero’s friend and his father’s rather high status. He’s nothing but a supporting character of the story.He noted the game story that he knew from his past life, used it, along with his authority and influence as a noble, to survive from demon king army.But, without realizing it, the knowledge from his past life and his memories of the game story affected the world. He saved people that should have died and took care of events that didn’t appear in the game.With that, he carved history of this worldThis is not a story about the hero. This is a story about struggle and effort of a young noble.

What happens when a fanfic author with a habit of lying and scheming suddenly finds himself as a self insert during Duelist Kingdom? What happens when you have Yugi, Joey, Kaiba, and the rest encounter someone who knows all about every major player in their saga... and sees no problem with abusing said knowledge? Chaos, dear reader. Sweet, sweet chaos

Three years ago, the animals and plants on Earth underwent crazy and unexplainable changes that included transformations, reversions, and the addition of otherworldly species. And it was the start of a brand-new type of profession in the new generation of humanity – Monster Trainers, people who specialized in taming monsters.

On his 18th birthday, the protagonist of the story, Gao Peng, suddenly received the ability of being able to see the attribute data frame of monsters. With his ability, he aspired to become the strongest monster trainer that ever lived while looking for a method to revive his parents!

- Description from Novelupdates