To Defeat The Overlord, The Hero Builds An OP Party in Regular World

Over the threat of the Overlord, humanity sent their number #1 hero to bring justice.

"I give you a chance to redeem yourself. Find strong allies for your sake and challenge me when you're certain."

When I thought all hope is gone, the Overlord gave me a second chance. Hence, I was placed in a regular world. But, how the hell am I going to find overpowered people around here?!