All Might and Deku accept an invitation to go abroad to a floating and mobile manmade city, called ‘I-Island’, where they research quirks as well as hero supplemental items at…

After the party of heroes defeated the Demon King, they restored peace to the land and returned to lives of solitude. Generations pass, and the elven mage Frieren comes face…

All Might and Deku accept an invitation to visit I Island where they battle against a villain who takes the island hostage.