A landing airplane was watched by binoculars. Before the plane even landed, it exploded. The man in green uniform and his subordinate put down their binoculars. The subordinate asked if it was an accident. The man in green uniform took a moment to answer. A tiny red light flew away from the burning plane. "No, it's them... Invaders." The man in green uniform finally answered. (Episode Title)

On TV was a "protect-the-earth" show, suddenly someone turned the channel to the news. The boy who was watching protested to his little sister who just turned the channel. -News: accident in Haneda Airport- The girl scolded her older brother to stop watching "kiddie shows". The boy called his little sister Saemi. The boy switched the channel back to his favorite show but Saemi turned it back to the news. They started to take turns on switching the channel until Saemi yelled at her brother that she did not want to watch the "kiddie show". Their mother began to cry. Saemi went out to go to school. The boy finished his food quickly and prepared to go too. The crying mother called her son Shun. Kazuko (mother of Shun, I'll use her unintroduced name because it is easier...) stopped cry-acting and reminded her son to pray to his father (who was already dead, btw). Shun did not care about his late father. Kazuko said he misunderstood his father then started to tell stories about Shun's birth. Shun knew the story was going to be long so he ran out. Shun leaned for a while on a post when Saemi frightened him. Saemi asked about their mother and Shun said it was the usual.

-Caption: May 1969- Shun told her sister not to run off again. Saemi reasoned that she did not want to deal with their mother's crying. Saemi pointed to a place where they (with their father) took a train. Shun bitterly said he did not remember it. Saemi saw Mr. Matsuda and greeted him. Mr. Matsuda who was fixing his three-wheeled car greeted back. Shun also greeted and asked Mr. Matsuda if the engine was broken *again*. Mr. Matsuda nodded and said if their father was alive he could have fixed it. Mr. Matsuda stopped talking and apologized. Saemi went off and Shun told her sister to be careful. Shun had to go also. Before Shun left, Mr. Matsuda gave his regards to his mother. When Shun was gone, Mr. Matsuda kicked his car.

The man in green uniform said they had lost six out of eight decoys already. A propeller plane was in the middle and was surrounded by a smokescreen (for security purposes). The propeller plane opened its body and revealed a cargo, numbered 8. The subordinate asked if the cargo would be alright. The man in green had devised a plan about it and mentioned about a girl.

A red school bus just passed Haneda Airport. A girl in yellow was touring the passengers. The man in green uniform awhile ago was now wearing blue and was driving the school bus. The girl introduced herself to the "tourists" as Ruriko Ikusawa. Within the bus was the cargo accomodated by the propeller plane awhile ago.

Shun's kendo match began. Shun gave his opponent a proud smile. When the opponent attempted to hit Shun, he did a stunt and said he would show real fight. Shun prepared for his special technique called Ultra Whirlwind Slash. Shun tried to jab his opponent but missed. The opponent hit Shun in his wrist and the match was over with Shun losing. After class, the kendo teacher called Shun. The teacher offered Shun to join the kendo club and learn from the basics and even mentioned of a scholarship possibility that could help Shun's mother. Shun preferred a part-time job so he declined the offer.

It was traffic in the main road so the red school bus took a narrow road.

<Scenes> In a ramen restaurant, a customer who just finished his soup complained that it was pig food. The customer even asked for his money back. Suddenly the man's face was starting to change.

A rowdy driver bumped Mr. Matsuda's car to a side. The rowdy driver enjoyed it. The rowdy driver also began to change in appearance.

An old man treated told his mistress he did not need him. The old man started to transform also.

These people along with others marched like zombies along the streets. They stopped somewhere and started to wear sunglasses at the same time. The zombie people turned into mannequin-like figures wearing uniform black coats and black hats.<End Scenes>

Ruriko Ikusawa was already bored with her tourist guide job. When an alien frequency was detected, Ruriko Ikusawa was finally spirited. ^_^; The driver (the man in green uniform awhile ago) pointed forward. The school bus was surrounded by smokescreen and started to convert its look into an armored bus. AEGIS Logo was revealed on its front. The smokescreen that was just covering the transformation slowly disappeared.

The black-coated creatures started attacking the bus with their bazookas.

Meanwhile, Shun was delivering newspapers to every household. When Shun finished delivering newspaper to a street he noticed Mr. Matsuda trying to push his stuck car. Mr. Matsuda was delighted to see Shun.

The "tourists" were just disguised soldiers and they called the driver Shirei (or Commander). Shirei asked Ruriko if she could do it. With no other choice, Ruriko agreed. Ruriko removed her yellow costume and was wearing an ordinary high school uniform. Ruriko called herself a Gate Keeper and said she was ready. Ruriko rose from the bus and so did the soldiers. The soldiers countered the black-coated creatures' bazookas. Ruriko formed a ring of light in front of her and extended a portable bow. Ruriko got an arrow hidden in her right thigh and pointed it to the enemies. Rings of yellow light started to circle around the arrow. Ruriko encouraged herself that she could do it. (BTw, the soldiers were starting to be knocked out one by one) Ruriko released the arrow and it zoomed through the enemies, hitting all in one straight line. The targeted black-coated creatures became green crystals. The subordinate could not believe Ruriko did it with a single shot. Shirei explained that Ruriko had the ability to draw power from alternate dimension and it was called opening a gate. Shirei added that the drawn powers could be released as tremendous energy. Shirei stated that Ruriko was their first Gate Keeper and had the ability to open the Gate of Life.

Meanwhile, Mr. Matsuda and Shun struggled to carry the car back to the road.

Ruriko continuously attacked enemies in a straight line. Just as when Ruriko was enthusiastic to finish them all, Shirei stopped her because of her stamina limit. Ruriko could not disobey Shirei so she followed. The armored bus escaped. Then the tiny red light appeared above the black-coated creatures. The red dot became a red hat. When the red hat landed on the ground it rose as a figure that looked like the enemies except, red. Apparently, the red creature was the leader and it commanded the initiation of "fusion". The people who were watching thought it was going to be on TV. The coated creatures became a huge Iron ball. When the Iron Ball started to roll, that was when the surrounding people started to run away.

Ruriko summoned her gate again to heal the wounded soldiers. The soldier's wounds were instantly treated and no trace of blood was left. Shirei said it was a part of Ruriko's ability. Ruriko started to feel weak. On the dashboard's interface, the enemy was detected to be following their bus. Shirei realized that the enemies changed in their combat form (fusion).

The Iron Ball took a shortcut to intercept the bus.

Mr. Matsuda's car finally got out of the edge. Mr. Matsuda thanked Shun for his help. To their dismay, the Iron Ball happened to pass by, and the poor three-wheeled car was run through. Luckily, Shun pulled Mr. Matsuda right away. Poor Matsuda was teary eyed when he saw his flattened car.

The Iron Ball threw small iron balls at the bus, it didn't just target the bus but the whole surroundings. From fences, to electric posts, etc. The bus got knocked off to its side (the cargo got slightly unattached inside). The Iron Ball continued to roll along the way.

Shun ran after the Iron Ball because it was heading to the direction of his house. Shun stopped when he saw the memorable place wrecked. The place was where his whole family (including his father) waited for a train.

The thrown iron balls returned to the main Iron Ball. Ruriko jumped out of the knocked out bus and took all arrows from her dispenser. Ruriko opened her gate. At the same time, Shun was starting to form rings of bluegreen light around his pupils. Ruriko released all of her arrows at the same time but it only destroyed a portion of the ball. Ruriko fell to her knees and wondered if her power was not that strong.

The unattached cargo was called Gate Power Amplifier by the subordinate. The man told Shirei that it was responding to something. Shirei said it was impossible because it was not even switched on. The man suggested that it was reacting to Ruriko's power. Shirei disagreed because it should not happen on normal gate powers.

The red core of the Iron Ball detected a strong energy so it warned fellow black-creatures.

Shun picked a can and prepared to run.

The Gate Power Amplifier was glowing. Shirei said there must be a strong Gate Keeper nearby. The Gate Power Amplifier's glow was getting stronger. Ruriko wondered if there was a Gate Keeper stronger than her. Then Ruriko noticed Shun running towards the Iron Ball.

Shun angrily threw the can to the Iron Ball, saying he would not allow it to destroy his home. A fast circling wind pushed the can to the Iron Ball. Shun was amazed about the power he released. The red core looked at Shun and he was the target. The Iron Ball rotated while it ran after Shun. The Iron Ball threw balls at Shun until he fell. Ruriko ran to where Shun was knocked out. Shun was covered by heavy weighted scraps and Ruriko removed them with all her might. Ruriko told Shun to hold on. Shun thought it was funny he thought about his dad who he hated. Ruriko held to Shun's hand and healed him. Ruriko told Shun that the weakpoint was the red core. Ruriko said she could not fight anymore and Shun could be the only one to defeat the enemy. Rings started to form in Shun's pupils again. Shun picked a pipe near him and started to go for the red core. The red core redetected the strong power. Huge rings of light formed in front of Shun and Shun absorbed it to his pipe. A squall was forming around Shun and Shun started to bash every balls attacked to him. Shirei was observing Shun. Shun jumped and attacked the red core with his special technique, Ultra Whirlwind Slash. The squall was accumulating inside the ball and with the red core attacked, the other black balls disintegrated like chain reaction. The Iron Ball finally disappeared. Shun had no idea what he had just done. Shirei told Shun it was gate power. Shirei said he was looking for someone like Ruriko and it happened to be him. Shun looked at the girl. When Shun mentioned his name to Shirei, Ruriko seemed to recognize him. And Shun was also beginning to recognize Ruriko. Shirei was talking about needing Shun's power to protect Earth from Invaders (the black and red coats a while ago) and was explaining about the meaning of Gate Keepers. Shun was not listening and was trying to recognize Ruriko. Finally Shun got it and he chuckled. Before Ruriko could hear what Shun had to say, she screamed. Shun said they were neighbors back then and Ruriko was his friend he called, "Rurippe the Sniveler". Ruriko was angry with shame. Shirei stopped talking and was calm even though Shun did not listen to him.