The Number Eighteen Pawnshop on Zhenhun Street

The protagonist is pretty weak during the first two volumes, but after that transition, the story gets explosively satisfying.

What? He's the strongest fighter in the universe?

He chose to take that final step to save the entire universe.

Chaoyang Street in Linhai.

It was an utterly ordinary street,

but it was home to an extraordinary pawnshop,

whose doors had never once been closed.

Its entrance stood open in the real world,

but beyond it lay other dimensions.

Ever since a young man stepped into the pawnshop,

one bizarre incident after another began to unfold.

And within him

lay a world-shaking secret no one knew about.