High Martial: My Overlord Grandpa Takes Me to the Top

What? You want to compare strength with me? I wield time and space in my left hand, and gods and demons in my right.

What? You want to compare backgrounds? Go talk to my Grandpa Overlord.

What? You want to compare luck? Do you even understand how valuable a double gold pull is?

The synopsis is too short. Please check out the main story.