Previously on My Hero Academia: The Oki Mariner Crew is pursuing a ship carrying chemicals used to make an illegal Quirk Booster drug. Due to the difficult situation, Selkie requests a team up with the Ryukyu agency. Ryukyu, Uraraka, Asui, and Nejire arrive, and Selkie has the young heroes relax on the beach for the day to boost their morale. As the sun sets, the heroes take to the ocean while the smugglers attempt another escape. Selkie and Asui board the ship, but a cargo plane carrying the chemicals starts to take off. Sirius fires a harpoon carrying Uraraka, who utilizes the grappling hook in her new costume to latch onto the plane. Uraraka takes out the smuggler and with help from Ryukyu and Nejire, lands the plane safely. Afterwards, Selkie and Ryukyu discuss how the smugglers' client had used a fake name and that the chemicals were supposed to be brought to Otheon, Europe. Meanwhile, a mysterious man hears about the disrupted delivery. However, he declares it to be fine as he already has the amount needed to prepare for the "salvation of humanity".
Tonight: Endeavor brings his work study students over for dinner at Fuyumi's request but faces awkward conversations at home.
