Mech: Shattering of the Galaxy - Chapter 11 - Fat Harry

If the Red Dragon's head could pour out half a skull's worth of magma, the world would then witness the rise of the most enlightened monarch—the Red Dragon Book.David closed the book, a puff of Dragon Breath turned it to ash, and he whipped himself up a bottle of Fiendfire Elixir.To hell with bloody rationality.I just want to do as I please!This is the story of a Red Dragon rampaging through an alternate world, constantly rewarding itself by embodying the Seven Deadly Sins.

The middle boss of the AAA-class game produced by the company. The villain who dies 999 times out of 1,000 times. Deculein.That person, was me now.“You’re going to die on almost every route.”Deculein, like all villains, inevitably dies.[First and foremost survival goal: Be what the game requires you to be]I’ll have to survive even if it means twisting my fate if I am destined to die.

Lu Chen had a dream, an incredibly long dream.. The dream world was familiar yet at the same time unfamiliar. Singer, actor, freelance writer, he actually went through three sections of different lives in a dream world! When he woke up, Lu Chen thus embarked on a bright road of becoming a perfect superstar!

- Description from Novelupdates

Our protagonist Caam is a man from Earth that was reincarnated into this world as a demon. In order to survive, he spared no effort in avoiding the sparks of battle and without noticing it, he became strong himself.