Brave Lord, Show Mercy

I have dreamed of becoming a hero since I was a child, and accidentally traveled to a different world of Dragon Quest! But... Why is I an evil dragon? Although it is very strong, according to the basic laws of the magical world, there are only accomplished brave men, and there is no invincible dragon! I can only blend into human society and beg the brave man to show mercy! But slowly I discovered that the so-called brave men and evil dragons are not what they literally mean, and the brave man may not be merciful... (The writing is very relaxed and the plot is serious) (First-person perspective, the protagonist works part-time as a complainer) (Big Sangou is new here, please give me lots of criticisms and corrections!)