The three Gate Keepers were aboard the Shinkansen (bullet train) to check out a Gate Keeper candidate. Both Shun and Reiko were acting childishly because it was their first time to board Shinkansen. Shinkansen stopped at Nagoya and Reiko went out to buy lunch. Shinkansen headed further, leaving Reiko behind. (Episode Title)

Ruriko and Shun arrived at Himeji Castle to find Gate Keeper candidate B-374, Choutarou Banba aka "Bancho" somewhere. Ruriko showed her AEGIS license to a man who happened to be an AEGIS Agent. The agent confirmed that Chotarou Banba was in the castle.

Somewhere in the castle was Bancho who was surrounded by a gang. The battle was supposed to be one on one as the gang leader promised. Bancho shed tears for the gang leader because he could not tolerate lifeforms who could not keep promises. Bancho combatted the troops and used his "Double Inner Circle Throw" to the gang leader. Instantly, the whole gang was defeated. Bancho was about to walk off after a "worthless fight" when Shun stopped him. Ruriko and Shun were right behind and were wearing gang costumes. Shun was wearing a costume similar to Bancho's attire and Ruriko was wearing an afro wig (similar to the gang leader - except Ruriko still had the yellow ribbon!), a mask, and was holding a chain. Ruriko cried and shame and said she could not face her mother. Shun explained to Ruriko that their costumes were made for them by AEGIS Costume department to cover their identity. Bancho asked who they were. Shun introduced himself as "Ukiya of Tokyo" and Ruriko introduced herself as "Ruri of the Chain". Shun told Bancho he came to fight him. Bancho was touched that his fame reached Tokyo. ^_^; Shun challenged Bancho to a fight but Bancho refused and said he never fights without a reason. Shun mocked Bancho and said he was just afraid to fight him. Bancho agreed to have a fight. A vehicle raced to their direction, cancelling the fight. Invaders bashed the car with their bazookas. Shun used his newly learned technique, "Vacuum Missile", but it missed. Invaders turned to Ruriko and Shun and fired them with their bazookas until it destroyed their disguise. Bancho noticed Ruriko and dramatically said she must be the princess reborn (senhime). Ruriko hit an Invader, and the remaining Invaders retreated. Bancho asked who they were. Shun revealed that they were the Gate Keepers. Ruriko called Shun's attention for revealing their identity. Shun said not to worry because Bancho was their ally. Bancho looked at Ruriko and kneeled before her. Bancho said he would do anything for Ruriko. The man in the vehicle appeared behind and called Bancho. Bancho called the man Hachiman-senpai (note: Hachiman means God of War). Bancho said Hachiman was his hero.
<flashback>Bancho was lying on the ground defeated. Hachiman stood before him and offered him food (or salt?). Hachiman told Bancho to use his strength for other people and not only for himself. Bancho cried.<end flashback>
Bancho contined that from that day he became the "delinquent of justice". Hachiman asked Bancho's help in their demonstration against the president of Salt Industries. The president seemed to have a plan to abolish the salt fields.

In the Castle Salt Industries building, the president was worried about the demonstration against him. The president's right hand, who had been working for him for three years, demanded the president that they should go on with their plan.

Ruriko thought that Invaders may have infiltrated the Castle Salt Industries. Shun wondered where Reiko was when they needed her.

Reiko sneezed and looked at the castle behind her. -Caption: Matsumoto Castle- Reiko knew she arrived at the wrong castle.

Ruriko reported to Shirei about the unexpected case of Castle Salt Industry. Miss Ochiai informed Shirei that the Castle Salt Industries had a surprising achievement for three years. Shirei ordered Ruriko and Shun to investigate the Castle Salt Industries. Ruriko and Shun agreed to Shirei's order through their communication watches. Bancho yelled he wanted to go with them because he wanted to protect "Princess Ruriko" (and Ruriko hated it) but he had a demonstration to attend. Hachiman allowed Bancho to go with Shun and Ruriko because the demonstration would start in the evening. Ruriko protested that Bancho was still an unconfirmed Gate Keeper. Shun told Ruriko that Bancho was a Gate Keeper and added that women would not understand men who traded punches. Ruriko noted that they had not traded puches yet. Bancho thanked Shun, and Shun told Bancho they were comrades. Ruriko wished Reiko was with them.

-Caption: Nijou Castle- Reiko realized she came to the wrong caslte again.

Ruriko, Shun, and Bancho came to the Castle Salt Industries to interview the president's right hand. They pretended to have an assignment about "Proper Cultivation of Special Regions". Bancho's tongue slips and asked about the Invaders. The president's right hand turned to them in suspicion and Ruriko and Shun said it was nothing while covering Bancho's mouth. The president's right hand led them to a warehouse and transformed into a red Invader. The red Invader locked them inside.

Invaders appeared where the demonstration would be held. A group of men appear in front in Hachiman's group and hid themselves in smokescreen. When the smoke was gone, the men had already transformed into AEGIS Soldiers.

Miss Ochiai reported to Shirei about Invaders' appearance in the salt fields. Shirei asked Miss Ochiai about the item. Miss Ochiai said it had finally arrived from Fuchu Base.

Shun tried opening the warehouse door but it would not budge. Bancho used his strength, calling himself Gate Super, until he opened the door. Shun praised Bancho and Ruriko muttered that it was not gate power.

Outside, while they were running, Ruriko gave a distress call to AEGIS headquarters. After running a bit, they stopped when a truck appeared. The truck revealed the Yotahachi in its back compartment. Shun could not believe in amazement. Ruriko explained that AEGIS makes sure Yotahachi was always in a three minute range around them. Even though Yotahachi was a two-sitter, Bancho pushed himself in the car to come with them. Shun drove the car but noticed the traffic in Sanyo Highway. Shun noticed a nearby pavement and had a plan. Shun accelerated Yotahachi and made it to jump to the nearby pavement. Bancho took Ruriko closer to him to balance the car, Shun acted with Bancho and leaned to Ruriko. Ruriko screamed, "PERVERT!".

AEGIS Soldiers were being beaten. Yotahachi finally arrived at the location. Bancho rushed to an Invader but got beaten instead. Shun hit the Invaders with "Ultra Whirlwind Slash", but hurt them only for a while. Invaders form their fusion and turned into a gigantic Centipede. The Centipede headed to Ruriko, who did not think of attacking (because it was a centipede...). A large log was thrown to the Centipede, Bancho rushed with another log in his hands and yelled, "GATE OYABUN!" (gate gang chief) The Centipede was broken to pieces. Shun praised Bancho, but Ruriko still said it was not a gate power. The red Invader led the black Invaders to a body of water. When they got in the middle, each Invader turned into a block. They merged and formed into a Massive Wall. The Massive Wall pushed the water towards the salt fields, planning to drown them all. Shun tried to stop the wave with his puny "Vacuum Missile". Of course it did not work. Bancho cried and said he'd happily die with "Princess Ruriko". Ruriko complained not to say such words. Shun wished he had more power. To their aid, Megane appeared from the sky. Megane was aboard a helicopter and brought with him the Gate Engine. Shun asked Ruriko what a Gate Engine was. Ruriko told Shun that it was the item/secret weapon he protected.

Shirei explained that the Gate Engine is a machine that amplifies gate power into physical power. In the Gate Engine's core was the engine block that reacted to Shun's power (episode 1).

Shun jumped to the Gate Engine and started to draw power. The wave was nearing them and Ruriko hurried Shun. Shun continued collecting power. When the wave was really *really* near them, Ruriko screamed more. Shun had finally collected enough power. The Gate Engine exhausted smoke and Shun released his amplified power. Shun's power destroyed the Massive Wall and also pushed the flow upwards.

Inside the AEGIS Hangar, Ruriko told Shirei that Bancho was not a GateKeeper. Shun protested and said Bancho did not get the chance to show his power. Bancho appeared. Shun asked how he got inside the base. Bancho said he would be always at Princess Ruriko's side. Megane explained that Bancho might have hung into the whell of the helicopter. Bancho saw Shirei and shook his hands firmly and strongly. Shun pleaded to Shirei to hire Bancho because he had been helpful. Shirei decided to make Bancho a Gate Keeper in training. Bancho was happy that he would always be at Princess Ruriko's side. Ruriko was not happy with it and cried. Shirei asked where Reiko was, both Shun and Ruriko totally forgot about her.

-Caption: Goryokaku- Reiko arrived in a plane region with no buildings at all. Reiko wondered if Goryokaku was a castle. ^_^;