Osaka Incident Arc

The Osaka Incident Arc is the fourth story arc in My Hero Academia: Vigilantes.

Koichi and Kazuho go to Osaka for a singing contest. Meanwhile, Fat Gum and Monika our asked to help Naomasa in an investigation involving the Trigger dealer: Number 6.

Prologue
Some time after Knuckleduster's departure, Koichi Haimawari continues to work as a Vigilante in Naruhata. During one of his patrols, he meets a giant, mantis-like villain rampaging down the streets of the city. Koichi tries to fight the evil-doer, but he is overpower and he runs away, but unfortunately for him, the Mantis villain is speedy too, and chases him down the street. During his escape, Koichi meets Jube Namimaru and Ichimoku Samazu and ask them to help him, but they wish him good luck and don't interfere.

Pop☆Step appears and begins advertising a new show at the Marukane Department Store. This angers Koichi, who tells her to stop advertising and to call for a hero or the police to deal with the villain. Pop☆Step replies him that she already called Captain Celebrity.

The American Hero appears and choreographs his introduction to the public's joy and Koichi’s annoyance, who dodges the villain's attacks. Koichi desperately asks Captain Celebrity to skip the intro and help him. Captain Celebrity swoops in and defeats the villain without breaking a sweat, being acclaimed by all the bystanders. After being saved, Koichi is told by Captain Celebrity that they should go back to the penthouse and talk about how justice should be handled going forward.

At the penthouse, Celebrity tells Koichi that he doesn't appreciate the extra workload he has to take whenever Koichi takes on a villain he can't handle and has to be saved. Koichi rebuttals by saying that the way Quirk-powered society should work is that the pros should save citizens who can't handle the situation themselves. Kazuho asks Captain Celebrity if he could show up at Narufest to attract more people, but he says he's too busy. Koichi asks him why he's slacking at the penthouse if he's so busy.

Celebrity tells him that Makoto Tsukauchi gives him a very busy schedule and when Koichi summons him, the penthouse is the only place he can escape to for relaxation. Makoto calls Koichi about Captain Celebrity's location. Celebrity gestures to Koichi not to say anything to help her figure out where he is, but Koichi does not understand the hint and says he is there, to Captain Celebrity's anger

Makoto suddenly appears, and Captain Celebrity tries to escape, but sneaks into Kazuho's area when she was changing her clothes and kicks him out of there. Makoto gets Captain Celebrity to leave since they have a busy schedule ahead of them.

After his departure, Koichi talks to Kazuho about the subject. Kazuho acknowledges that Captain Celebrity is right that they cause him a lot of trouble when confronting villains. Koichi is concerned that they are being really strong lately, and it does not appear that they are consuming Trigger as they do not transform back when they get knocked out.

Facing this situation, Koichi grabs Knuckleduster’s brass knuckle as he mentions to her that maybe he should carry a weapon for self deffense, but Kazuho advises against it, saying that defeating villains is not their duty, and they are more like dedicated to call real heroes when they spot troubles. Koichi admits she's right and leaves the brass knuckle in place.

A day later, at the Narufest, Pop☆Step thanks everyone for attending the event, organized by the Marukane Department Store. The final performance of the night is set to begin, "The Little Sisters" a trio of singers from Saint Lila's Academy for Girls.

In the audience, Nemuri Kayama is surprised to meet Shota Aizawa present at such a bustling event. He responds that he is on duty and stopping by for lunch. Shota asks her why she would be attending on her day off and Nemuri responds that it is because she enjoys such events.

Shortly after, detective Naomasa shows up, and apologizes to Shota for being late, telling him that Teruo's examination ran a little long. Then he points out to Shota that Teruo is there, enjoying the festival together with Jube and Ichimoku. Teruo is still in his form of a huge eel-like creature, although smaller in size than when he faced Shota several days ago. Shota and Teruo exchange glances and greet each other. Naomasa also greets Nemuri, apologizing for not being able to recognize her as Midnight out of her costume.

Naomasa informs the two about the latest information related to the trigger traffic and the Instant Villains. He says that a new type of villains that had begun appearing throughout the city. He tells them that Teruo Unagisawa had been arrested twice for being an "Instant Villain", however he had undergone a drastic change between his first and second arrests in that his physical form had completely changed and it seemed to be at least semi-permanent.

In addition, the police had found several other villains with similar alterations that had concentrations of Trigger present in them which was several grades higher than the lethal dose of the drug. This had led the Police Force to suspect that someone had purposefully altered their bodies to withstand higher doses of Trigger.

Backstage, Miu tells the Little Sisters that they should do their best and do Narufest proud, especially because a Pro Hero would be the special guest for the event. At that moment however, Kazuho comes up to her and quietly informs her that the Pro Hero would be unable to attend because of filming a commercial elsewhere, this shocks Miu who thinks quickly and says that the Hero's identity would be a surprise when the Little Girls asked which Hero would be attending. Miu asks Kazuho if she recognizes anyone as a Pro-Hero in the audience, whether they're disguised or otherwise.

Suddenly, Koichi pops in and asks if he can have one of the bento boxes they were serving to the guests. Miu chooses him as the special guest and throws him on stage, having Kazuho announce him as "The Crawler". The audience is underwhelmed at his presence and many are confused as to who he is. Naomasa pulls out his notes and finds he is also known as "The Cruller", though Nemuri recognizes him as Kazuho's manager. Koichi starts singing and is halfway good at it as Miu notes, however the Little Girls say they think Koichi is funny but they want to meet the Pro-Hero they were promised.

Elsewhere, Captain Celebrity and Tensei finish shooting their commercial but Captain notices himself looking less than stunning in one frame and asks for a reshoot. Tensei obliges and the Captain is glad, saying Ingenium has the attitude of a Pro-Hero.

Among the shooting crew, someone disguised as a worker takes out their phone and remotely opens the roof of a truck coming in at high speeds nearby, holding the Bat Villain inside, now transformed into a more powerful villain. As the reshoot is about to begin, the truck crashes in and releases the Bat Villain onto the scene.

He chases after Tensei who recognizes him. The Bat Villain glides over Tensei who tries to hold onto him and keep him grounded, however, the Bat Villain was anticipating this and slashes Tensei, causing him to fall to the ground.

The Bat Villain sets his sights on getting revenge on the Naruhata Vigilantes next and flies off in search of them. Tensei does not sustain any serious injuries from his fall and chases after the Bat alongside Captain Celebrity. The Captain is unable to outstrip the Bat but Tensei tells him to keep the Bat in sight and that they should ask for assistance from the city's Heroes who are capable of flight to set up a trap. The Bat Villain hears Koichi's singing at Narufest and makes his way towards his location.

Back at the festival, Naomasa tells Shota and Midnight that he believes there is an organization behind the distribution of Trigger that is also administering to others and altering them to be able to withstand greater amounts of the drug, as had happened with Teruo. Shota says that the organization must have some greater goal in mind because by themselves their "Instant Villains" and "Next-level Villains" could not do much and were more like disposable pawns. Naomasa agrees and says that is why he had come, to ask for Shota's help in the matter. Suddenly, the Bat villain swoops onto the stage and flies off with Koichi.

However, Captain Celebrity finally managed to catch up to him as he slowed down to pick Koichi off and knocks him out while also saving Koichi from falling to the ground. Calling him the perfect bait, the Captain says he has finally found a use for Koichi and lands on stage to greet everyone to thunderous applause and the Narufest organizers are relieved that he managed to show up after all.

Story Impact

 * Fat Gum's previous dealings with Trigger are shown.
 * The Mysterious Man is revealed to have a Quirk that increases his speed.

Characters Introduced

 * Kirihito Kamachi
 * Sisters of Saint Lila's Academy
 * Monika Kaniyashiki
 * Ichiro Hotta
 * Jiro Hotta

Quirks Introduced

 * Scissors: Monika's Quirk allows her to give her index and middle fingers the properties of a pair of scissors.