The Demon King Is Reincarnated and Wants to Gain the Power of Bondage

In the battle with the brave Akarin and his party, Black, as the Demon King, easily gained the upper hand. However, just as the battle was about to end—— The hero and his friends rushed up shouting about bonds and courage. So, Black lost. At the time of crisis, Blake used a forbidden-level time-travel tool to return to three years ago - the day when the brave men just set out. In order to gain the magical "power of bond" from the braves, he hid his identity and joined the braves' adventure group. This is a fantasy chapter where the Demon King and the Hero embark on a journey to defeat the Demon King together! —————————— This is a different world adventure road battle themed work. Write what you like, don't sign a contract, and update as the occasion arises.