I Don't Need a Powerful Dad: My Grandpa Is the Strongest of All!

[Afraid the updates will stop? Afraid of filler? Afraid the villains will get dumber? Afraid the protagonist will be a bleeding heart? Then this is the book for you: it has none of that! A million words already written, and if I ever stop updating, I’m a dog. You dare vote, I dare update like crazy every day!] After transmigrating to another world, he sees injustice and lets out a roar, specializing in putting arrogant, powerful bastards in their place! Beg for mercy? No use begging! Should’ve thought of that sooner, damn it!