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, Fatgum, 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. Fatgum 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. Fatgum 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 Tamamki to fight with the team and then the villains 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

Battles

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