Episode 104

Long Time No See, Selkie (お久しぶりですセルキーさん) is the one hundred and fourth episode of the My Hero Academia anime and the sixteenth episode of the fifth season. This episode is completely comprised of anime-original content, and acts as a prologue to the movie My Hero Academia: World Heroes' Mission.

Summary
As Izuku, Katsuki, and Shoto's first day of their Hero Work-Studies comes to a close, Izuku wonders how Ochaco's study at Ryukyu's agency is going. At said agency, Ochaco shows off her new hero costume to Ryukyu, Tsuyu, Nejire, as well as Ryukyu's sidekicks. Nejire then asks Ochaco about why she chose to upgrade her costume. Ochaco then thinks back to her latching on to an out-of-control Izuku during her Joint Training match, then proceeds to blush and dodge the question. Ryukyu hosts a small welcoming party to celebrate the students' first day back.

The next morning, the girls are watching a news report about a forest fire in Kaflin caused by an explosion from an illegal Trigger factory. One of Ryukyu's sidekicks says that the chemicals used to make the drug were missing from the fire, and it's believed the factory explosion was a way to destroy evidence move the materials out. Out in the Pacific Ocean, the Oki Mariner Crew is pursuing a suspicious ship carrying some obscured cargo. One of the ship members jumps out in front of the ship, and in combination with a dose of Trigger, creates a massive smokescreen to escape. Sirius believes the ship is hiding somewhere in the Verize Islands. Due to the enemy crew having access to Trigger and the islands being difficult to navigate, Selkie decides to schedule a team up with the Ryukyu agency.

Ryukyu, Tsuyu, Ochaco, and Nejire meet up with the crew at a harbor in the Verize Islands. Tsuyu expresses appreciation to Selkie and Sirius for mentoring her at her internship, and the two congratulate the student for getting her Provisional Hero License. Before the mission officially begins, Selkie tells everyone to relax and enjoy the beach. Ryukyu asks Selkie why they didn't go straight to work. Selkie says he wanted to boost the girls' morale from the constant stress brought on by hero work, and mentioned that the smuggling ship wouldn't make a move until it was dark anyway. Elsewhere, the rogue ship crew is hiding out in a cave. One crew members suggests calling their client for help since the heroes and coast guard are on high alert, but another advises against it to assume that any communication could be secretly monitored. The crew decides to stick to plan, and make a move once the sun starts setting.

Battles & Events

 * Joint Training Battle/Round Five
 * Fat Gum Agency vs. Villains
 * Oki Mariner Crew vs. Innsmouth


 * Ryukyu Agency & Oki Mariner Crew vs. Smugglers

Anime & Manga Differences

 * The episode is entirely anime-original
 * The anime introduces Ochaco's grappling hooks device much earlier than in the manga, which will not be shown until the beginning of the Paranormal Liberation War Arc.