Shie Hassaikai Raid

The Shie Hassaikai Raid is an event that takes place during Class 1-A's Hero Work-Studies. The offices of Sir Nighteye, Fat Gum, and Ryukyu combined with other Pro Heroes seize the Yakuza hideout in an attempt to rescue Eri and arrest Overhaul.

Prologue
Sir Nighteye and his office near the climax of their investigation against Overhaul and the Shie Hassaikai. They invite Fatum's office, Ryukyu's office, Shota Aizawa, Rock Lock, and Gran Torino among other heroes. The hero offices also allow the U.A. students to participate.

Since the incident where Overhaul attacked Team Reservoir Dogs, the Heroes at the Nighteye Office have been investigating the Shie Hassaiakai. Centipeder notes that the Yakuza organization has been making contact with several other parties and appears to be gearing toward accumulating funds for an unknown operation. Centipeder and the Police confirmed that Overhaul made contact with the League of Villains and that a fight occurred.

The Nighteye office recruited Gran Torino and the Naomasa Tsukauchi because they're investigating the league. Sir Nighteye also invited heroes who have experience dealing with criminals who are active on the Black Market. Fat Gum reveals to the group that the Shie Hassaikai are distributing bullets that have the ability to erase Quirks. Unlike Shota Aizawa's Erasure ability, these bullets have the potential to damage a person's Quirk Factor.

Tamaki's injuries from the previous battle healed and his Quirk returned, but this drug still holds dangerous potential. Fat Gum explains that research involving one of the confiscated bullets contained blood and human cells. This means that this drug derives from someone else's Quirk. The Shie Hassakai are likely using middlemen organizations to deal the bullets just like they do for Trigger.

Sir Nighteye reveals that Kai Chisaki is the Yakuza Captain of the Shie Hassaikai and his Quirk ability is called Overhaul. He says that the Shie Hassaikai are armed with Quirk Erasing Bullets and a Quirk that can disassemble and reassemble anything. The villain group has likely been distributing the test samples to gain the interest of other criminals. Sir Nighteye believes Quirk Destroying Drug is made from Eri, a girl who Izuku and Mirio encountered during their Work-Study. The upcoming operation to raid the Shie Hassaikai's hideout is aimed at rescuing Eri.

The Nighteye Office worked hard to gather information about the Shie Hassaikai's circle of connections and triangulated areas where Eri might be. The heroes gathered at this meeting are tasked with searching these places for the hideout and Eri. The mission begins a few days later after Sir Nighteye tracks a member of the Shie Hassaikai to a toy store where he was getting presents for Eri. Bubble Girl and Centipeder were able to successfully stakeout the correct hideout and discover the proper time frame when Eri and Kai Chisaki will be there.

Sir used his Foresight Quirk to confirm the location and the Police got a warrant to raid the facility. The heroes move out immediately and arrive just outside the Yakuza stronghold.

Incident
Just as the Police prepare to enter the large residence, Rikiya Tatsukame bursts through the door with a giant right hook. Two men get flown high into the air but Deku and Eraser Head are able to secure them. Rikiya is surprised the Heroes got wind of the Shie Hassaikai's themes. He attacks but is met with Ryukyu's powerful dragon-shifting Quirk. Team Ryukyu engages the giant villain while the others storm the base.

The heroes are met with a large resistance of yakuza thugs. The smaller time heroes subdue them after a battle of Quirks. Overhaul senses the heroes fast approaching and assigns his Eight Expendables to deal with them.

Sir Nighteye leads the group to Overhaul's secret escape passageway he learned of using his Foresight. Yakuza thugs ambush the Heroes, prompting Centipeder and Bubble Girl to retaliate. Centipeder uses his Centicoil technique and Bubble Girl uses his Bubble Quirk to subdue the criminals quickly. The heroes run down the stairs into an underground labyrinth that has been warped by Overhaul's Quirk.

Lemillion slips through a distorted wall and confirms they haven't run into a dead end. Deku and Red Riot use their Shoot Style and Red Gauntlet Super Moves to break down the wall and open the path. However, the path has been warped and distorted by yet another Quirk. This time, it's Mimic of the Shie Hassaikai using his Mimic Quirk to merge with the path and warp it. Tamaki starts to panic about being unable to continue on but Mirio reassures him and goes ahead by phasing through the path.

Mimic drops the rest of the group one floor below where Toya Setsuno, Yu Hojo & Soramitsu Tabe are waiting to ambush them. Suneater realizes the villains are trying to buy Overhaul time and resolves to face the villains alone while the others go ahead. Eijiro pleads with Tamaki to fight with the team and then the villain's attack. They pull out weapons after having their Quirks stolen from them by Eraser Head. The Police pull out their firearms and panic, but Suneater swoops in and defuses the situation. He ties up the criminal trial and asks the others to go on without him.

Suneater allows the others to continue the mission while he fights Setsuno, Hojo, and Tabe alone. Suneater controls the fight early but Setsuno and Hojo push back when their Quirks return. Suneater stays strong by going past his limit and using his Super Move: Chimera Kraken. Tabe wakes up having been knocked out by Eraser Head and turns the tide of the fight into the villain's favor. Suneater channels inspiration from Mirio's dedication and makes a comeback victory over the trio of expendable bullets.

Mimic slows down the Police mob on the upper floors, allowing Nighteye and Fat Gum's squads to traverse further into the labyrinth. Mimic notices that Setsuno, Hojo, and Tabe have been defeated and is surprised because they had considerable abilities as a team. He turns his attention to Eraser Head and attacks him using the walls of the tunnel. Fat Gum and Red Riot save him and end up tumbling down a hole to another room where Kendo Rappa and Hekiji Tengai await them.

Rappa makes the first move and crushes Red Riot's Super Move. Fat Gum stands up to the fearsome Spear and Shield combo while Eijiro combats his fears. Eijiro feels helpless as Fat Gum and Rappa engage in a slugfest, fearing that he's powerless to help. Fat Gum has his own tricks to counter the villains but needs more time to carry it out. Eijiro fills the role of a Spear and attacks Rappa on his own. Thanks to Eijiro's manly sacrifice, Fat Gum gains the power to win the brawl of spears and shields.

Mimic turns his attention back to Nighteye's group and tries to crush them using the cave walls. Rock Lock's Quirk keeps an area around the team stable, allowing them to traverse slowly forward. Mimic's Quirk is putting great strain on his body and didn't use this type of attack until he felt he had no other choice. Mimic changes the shape of the cave to let in a temporary Squad creating from members of the League of Villains: Himiko Toga & Twice.

Himiko injures Rock Lock and Twice attacks Sir Nighteye and the Police using a clone of Rappa. Nighteye makes short work of the clone and forces Twice to retreat. Himiko and Twice regroup and decide they're free to act on their own. Himiko and Twice use the heroes to their advantage, giving away Mimic's position in the walls by taunting him to the point of a temper tantrum. Deku and Eraser Head defeat Mimic and the League members escape, satisfied with themselves.

Lemillion manages to catch up with Overhaul and Chronostasis before they escape. Shin Nemoto and Deidoro Sakaki ambush him while the villains take Eri away. Lemillion manages to avoid all of Nemoto's Quirk Erasing Bullets, and finds his resolve despite the villain's constant verbal abuse. He defeats both the villains instantly using his Super Move: Phantom Menace.

Mirio quickly catches up to Overhaul and attacks. He swipes Overhaul away and phases his foot through Eri's face to knock Chornostasis away as well. Lemillion takes Eri into his arms and promises to be her hero. Overhaul activates his Quirk and attacks Lemillion and Eri. He claims he can restore Eri's body to normal whenever he wants and he's sealed off any means of escape. Chrono threatens to destroy Mirio's Quirk with the Quirk-Destroying Bullets loaded into his pistol.

Lemillion evades all of Chrono's shots and wraps Eri in his cape. He disarms Chrono and launches a fierce counterattack that proves he's stronger than even Overhaul. Eri watches inspired that she might actually have a hero. Shin Nemoto craws his way into the cave and Overhaul commands him to shoot Lemillion.

Nemoto aims the bullet at Eri, knowing that Lemillion will give in to his heroic nature. Mirio jumps in front of the path of the bullet and sacrifices his Quirk to protect Eri. He promises the young girl that she'll never have to know pain again.

Overhaul taunts Mirio's efforts, only to get beat down by a Quirkless Hero who proudly claims he will always be Lemillion no matter what. Mirio fights another third of the battle without his Quirk, protecting Eri the entire time. Before Overhaul can kill Mirio, Deku and Team Nighteye burst onto the scene.

Battles

 * Ryukyu Squad vs. Rikiya Katsukame
 * Suneater vs. Setsuno, Hojo &amp; Tabe
 * Red Riot &amp; Fat Gum vs. Rappa &amp; Tengai
 * Nighteye Squad vs. Toga &amp; Twice
 * Nighteye Squad vs. Mimic
 * Lemillion vs. Nemoto &amp; Sakaki
 * Lemillion vs. Overhaul &amp; Chronostasis
 * Nighteye Squad vs. Overhaul & Chronostasis
 * Deku vs. Overhaul