My Hero Academia: The Two Heroes

All Might is invited to a summer trip at "I-Island", a man-made island where the top scientists of the world reside and perform research on Quirks, superpowers that 80% of the world's population has. He takes Izuku Midoriya as his guest and reminds him not to reveal to his good friend, former partner, and top scientist Professor David Shield the secret about their shared Quirk: One for All. After they arrive, they are greeted by Melissa Shield, David's daughter and a student of the island's academy hoping to be a scientist just like her father. Read more on Wikipedia.