Otherworldly Development Plan

After transmigrating to another world, I didn't become some famous big shot. Instead, I became a slave trader.

I figured I wasn't going to amount to much in this life.

But then, one earth-shattering figure after another started appearing among my slaves: heroes, Demon Lords, angels, empresses...

I wasn't happy about it, though. When I think about how I treated them back then, I feel like my life is in danger.