Like any trained soldier, Momo Maruo understood that working with others produced the best results. She had departed from her home in Tokyo's historic district at 19 to join the United Airforce, becoming a 1st Lieutenant within a few months. When the Machine Empire Baranoia had invaded Earth soon afterwards, she and her fellow 1st Lieutenants, Juri Nijou, Yuji Mita and Shouhei Nokkaichi, were seconded to the Overtech Hardware division under Captain Goro Hoshino, becoming Ohranger to fight off Baranoia's attempts to secure Japan, the last holdout of free humanity after their invasion. Now, a year after Baranoia had been defeated for good, Momo was now on a mission near Lake Kutcharo, seeing how well she could handle herself if she was lost in the wilderness. She had set up a camp just short of the nearby city, which was her target. But before she could prepare to go to sleep, she saw her mittens and parka surrounded by a golden aura. "What the-?", she managed to get out before she vanished completely, leaving behind an empty tent.

Momo soon woke up to see herself surrounded by multiple people. To her surprise, they were all dressed in swimsuits and bikinis. Even more confusingly, her tent was gone and the snow had turned a shade of brown suddenly. Taking off one of her gloves, Momo felt and realised it wasn't snow. It was sand. "Hey, miss.", one of the swimmers asked. "Are you okay?"

Momo pulled herself up, pulling off the ski mask and goggles she had been using to protect her face. She could tell she wouldn't be needing them in the warmer weather of wherever she was. At least the people there spoke Japanese. "This might seem strange, but can you tell me where I am? I was supposed to report in at Hokkaido, but I seem to be off."

"You certainly are.", one woman assured her. "This is Tsushima Island."

Momo was shocked by this. Someone had transported her several miles across Japan to a different region altogether. She tried reaching for her Back Brace, only to find that it, along with her Storage Crystal, had been taken. She then decided to pull some of her military clout. "Momo Maruo, United Airforce. I need information on any nearby seaports. Now."

From his control room, the orchestrator of the experiment observed this with a smile. Subject 5 is making excellent use of her military background for her own devices." He then began operating his console. "It is time to introduce the opponent for her in this situation."

Sometime later, Momo had boarded a luxury boat heading for Izu-Ōshima in the Kanto region. There, she could make her way back to Tokyo to report to Miura directly about her mysterious attack. While replacing the Power Brace would be impossible, she could at least assure that UAOH were searching for the thief to recover it. For now, she was waiting in her cabin for the trip to conclude. Then a steward came into the room. "Excuse me, Miss. There's a lady who wants to meet you on the top deck."

Momo was confused by this. She was sure that she wasn't expecting anyone to meet her on this ship. But hopefully, this woman was a friend she could make her report to. "Thank you. I'll be up in a few minutes."

Sure enough, within 8 minutes, Momo had emerged onto the top deck, dressed in her UAOH uniform, the only clothes she had on underneath the winter gear. On the deck was a woman in a mink fur coat, stroking a Maltese chihuahua. "You… wanted to see me?", Momo asked, confused.

"Oh yes, I did.", the woman said as she smiled. "It's been a long time, OhPink."

The woman then transformed into a primarily pink robot with a silver head and yellow eyes. Momo recognised her immediately. "Malthiua. How are you still here?"

"I have revived from hell in this world to take my revenge on you.", Malthiua announced, as she summoned her bow. "And then I'll conquer this world in honour of my Bulpie." She fired an arrow, that Momo narrowly avoided.

Momo then ran forward, only for the chihuahua to transform into a golden-coloured robot, resembling a steam train. Momo recognised him as a new Bara Guard, the Machine Beast that she had faced when she had Gunmazin under her control. But now she was on her own, without an equipment or allies. "Looks like I don't have much choice." She ran in, using her aikido skills to try and face the Machine Beast, but this one had a different set of weapons to the first. It attacked her with a spear, a tantou, a handgun and a dagger. Any blows she tried to strike ended up hitting a shield.

"Give it up, OhPink.", Malthiua gloated as she walked near the railings. "Without your precious Choriki, you don't stand a chance."

"Perhaps I can't overpower you.", Momo admitted. "But I can outsmart you." She ran forward and pushed at her enemy, sending her overboard. Bara Guard 2 stopped fighting and leapt after his mistress. Momo knew that this wouldn't stop either of them. It was simply a stop gap solution to buy her time to prepare for the second round. For now, she headed back to her cabin to wait out the rest of the trip.

A short time later, Malthiua and Bara Guard 2 washed up at a shipping port. "Curse you, OhPink!", the Empress of Baranoia fumed. "I haven't come all this way for you to thwart me so easily. Next time, you will fall to the superior power of machines."

"Are you sure you can do that alone?", a mysterious figure standing nearby asked. "Perhaps the two of us should pool our resources together. You don't even have access to an army."

Malthiua stood up, beholding the figure and seeing that he was a machine, like her. She instantly abandoned any intention of fighting and became reasonable. "So you can provide me with such an army, I take it?"

"Indeed.", the other figure nodded. "Like you, I have been displaced into this world by an unknown force to fight my old enemy, along with three others. But I have full details of who our enemies and allies are, along with a factory in which we may construct our armies."

Malthiua was intrigued. "Very well then. With 4 others like me as allies, we can defeat our hated enemies with ease. But then, what will we do with this world afterwards?"

"We will have to make the decision then.", her new ally answered. "Come. We have work to do."

Elsewhere, Momo got off the boat at Izu-Ōshima, as she intended. Once there, someone at the customs desk was surprised to hear her name. "Momo Maruo? We've got a letter for you here."

Momo was surprised to hear this. She didn't think anyone she knew would've known she was coming out here. "I'll take it.", she said in response. After getting out of the queue and into the streets, she stopped to open the letter, which was marked with a golden corner with a stylised "S" in it. She then read the contents of the letter.

Kaito Kumon, Yakumo Kato, Shinya Hiraga and Momo Maruo. Like you I have found myself in a strange new world, cut off from my allies and most of my resources. I suggest that the 5 of us meet in my location to discuss the matter of trying to figure out the nature of this world and why we have ended up here. While I know for a fact that one of you will be able to reach my location by their own means easily enough. As for the other three, I will send my personal helicopter to airlift you from Kyoto. Regards.

Hiroto Sutou

The rest of the letter was an address in Tokyo, which Momo assumed must be where this Hiroto had holed himself up. Given that the letter indicated she wouldn't be finding any of her comrades or superiors in this world, she would have to make do with these people. Luckily, the envelope contained mugshots of the people she was expected to work with, so she knew who to look for. She would look over them on the train.

Sometime later, Demushu made his way to the factory lair he had been told to hole up in. "I can't believe that yellow ape is getting more power so soon.", he growled. "Even worse, I was forced to retreat to this place."

"Just be grateful you came back alive.", Yogosmacritein snarled. "Unlike that worthless BankiJuu I sent out. I was a fool to rely on him."

"Perhaps.", Malthiua pointed out. "But if I recall, Dump Banki still has a supply of Bikkurium energy within him. We can revive him as we please. But in the meantime-." She gestured to a group of ape like robots with golden masks, some with silver bodies sporting spears and some with pink bodies who were bare fisted. "I have constructed an army of Baro soldiers to crush the heroes, along with some who will serve as my entourage."

"You created a whole group of footsoldiers purely for your own use?", Dr. Zora questioned. "Why?"

"Oh, that's just an idea I got from Ariake over there.", Malthiua answered as she pointed at their Yokai ally, who was being waited to by her servants, the Hyakkarage, white vest wearing versions of the Jukkarage. "If she can have an entourage for her own use, then why should I be denied the same comfort?"

"Do what you want with your own soldiers.", Yogosmacritein stated. "Just know that now that we 5 are united in our cause, our armies will be unleashed to attack the 4 of our enemies who have gathered, Armoured Rider Baron, AoNinger, Riser Gant and Go-On Gold, defeating them before they can fully unite with OhPink."

"And hen I will deal with that ingrate personally.", Malthiua insisted. "In her current condition, she can't hold a chance for victory."

"But first, we have to ensure our onslaught is total.", Dr. Zora pointed out, before walking over to Ariake. "Can we-?"

"Sure, you can use my Jukkarage.", Ariake said dismissively. "I can make as many as I want, as long as I have a steady supply of human fear." One of her Hyakkarage came forward with a flask.

"We'll see what we can do.", Dr. Zora said as she took the flask. "All is prepared."

Elsewhere, Momo was in some bushes, sighing. She had found her way to meet the group she had been told to join up with. But after observing them in battle, she had been thoroughly unimpressed. They had failed to do anything resembling a combined effort during their battle. Any team efforts they achieved were pure blind luck. And after the fight, they spent more time arguing over who did the most work in the fight than assuring themselves that the evil had been defeated. But, since they seemed to be her best chance at discovering why she had seemingly been brought to another world and getting back home, she was following them, waiting for a good chance to reveal herself to help them. They were walking back to wherever they were based, but the one in the black overcoat and the one in the jeans (she had no idea who was who out fo the four men), while the one in the blue suit was talking to the one with the blonde hair. "What's on your mind, Hiroto?", the former of the latter pair asked.

"Why didn't Dump Banki enlarge?", Hiroto asked. "I did nothing to target his Bikkurium capsule, nor damage his body severely." But before he could think about it more, a Jukkarage leapt out to attack him, only for Yakumo to block. And then a group of Ugutz appeared and started shooting at them, causing him to push everyone to the floor. Then a group of Zargoal appeared as they were pulling themselves up, forcing them on the defensive. "Three of these grunts at once?"

"Make that 5.", Kaito yelled, pointing out not just the approaching army of Baros led by Bara Guard 2, but the large amount of Elementary Inves emerging from cracks and landing in front of them. "Looks like all of our enemies have come together to attack us."

"Along with another.", Shinya added, as he kicked a Jukkarage down, before backhanding an Inves. "These silver guys aren't with me and I doubt any of you know them. They probably came with that robot. We need to transform."

Everyone nodded and initiated their sequences. "Henshin!" Banana Arms! Knight of Spear!

"Shuriken Henge!" Ninja!

"Souchaku!"

"Let's Go-On!"

Soon, all 4 of them were transformed, fighting their way through 5 different groups of combatants. Momo looked on, watching as they tried to fight off being overwhelmed, but to no avail. "I need to get in there. But without my Powered Suit, I won't last longer than a few minutes, if that."

At their factory hideout, the 5 villains observed the beatdown as well. "This is just the start of the attack.", Yogosmacritein stated, as he waved for a mechanical device to begin turning. "Bikkurium energy, activate!"

Green liquid pumped into the body of Dump Banki, reviving him and causing him to enlarge. "Industrial Revolution!", the BankiJuu called out.

From the battlefield, the heroes all looked up at the giant, who was beginning to throw larger balls of junk around the city. "This is bad. We can't fight Dump Banki and these at the same time.", Kaito called out. Then Bara Guard 2 appeared to fight him, with the two locking their spears together. "But I can at least deal with this pile of spare parts." He activated the Squash function on his Sengoku Driver. Come On! Banana Squash! He threw a beam of energy, shaped like a banana, at his foe, only for Bara Guard 2 to slice it in two. "What the?" The Machine Beast then generated his own energy beam using his own spear, slashing Baron down.

Bara Guard 2 then moved onto Yakumo, switching weapons for his tantou. "This will be easy.", Yakumo commented, setting his Goton NinShuriken. "Shuriken Ninpo: Chain no Jutsu!" Kin Kira Ja! A chain shot out of the Ninja Ichibantou, but Bara Guard 2 cut through that as well, before launching his own chain from his own weapon, which knocked Yakumo down. "He's copied all of our weapons and attacks."

"That would explain his different arsenal.", Momo realised, remembering that Bara Guard had a different set of weapons when she had faced him. This just strengthened her resolve. "Even without the power of the super ancient civilisation, I'm still a soldier fighting for peace on Earth. If I face tomorrow with courage burning, I won't have anything to fear from Baranoia, or any other enemy. Once I start running, I never stop." As she said this, she felt something burning on her hands, looking down to see her Back Brace and Storage Crystal were on her hands once more. "Alright. I can do this." She leapt out into the battle with a loud grunt, that drew the intention of everyone, as she put the two parts of her Power Brace together. "Choriki Henshin!" A wireframe formed around her, onto which her Powered suit was deposited. "OhPink, Olé!"

Everyone was shocked by the sight. "So that's our fifth member.", Hiroto noted. "What an interesting suit."

"I could say the same for your yellow friend.", Momo commented, as she ran towards the group of Baros. "Battle Stick!" She pulled out one of her sidearms, delivering a slash that took out a whole group of them, before facing another, swapping out her weapons. "King Blaster!" She shot at them, blowing them down. "I'll take care of the giant robot, you deal with these grunts." She ran off to face Dump Banki.

"What do you think we were doing before?", Shinya commented, as he transformed his Gant Slugger and fired on a group of Zargoal. "Gant Slugger, Versus Cannon!"

Hiroto likewise went up a group of Ugutz. "Jet Dagger!" Mission 6: Full Power! He zoomed towards his foes, slashing all of them.

Yakumo went up against the Jukkarage. "Karakuri Hengen: Katana!" He placed his NinShuriken on the weapon, before slashing. Katana Hengen Zan!

Finally, Baron faced the Elementary Inves in his Black RX Arms, activating his Au Lait function. Come On! Robo Rider! He transformed into Black RX's armoured form as the Prince of Sorrow. "Vortech Shooter!" He fired several shots.

From all of these hits, the 4 armies all exploded utterly, leaving the 4 to face Bara Guard 2.

In Tokyo, Momo was facing down Dump Banki. "Aww, does the little pest think they can stop me?", the giant BankiJuu said mockingly.

Momo posed her arms, creating a ball of light. "Senkou: Miracle Kikoudan!" She fired the ball at Dump Banki, buffeting him, and causing him to slam his hand towards her, with Momo narrowly jumping out of the way. As Dump Banki launched his Dump Shot, Momo used her weapon to deflect. "Circle Defenser!" She then charged the weapon with energy. Shippu: Choriki Defenser!" She jumped upwards to ram into the giant robot and push him back. She then combined both her holstered weapons, aiming at the robot's chest. "King Smasher!"

The shot fired damaged Dumo Banki significantly. "People should really be careful of what they put in a landfill.", Dump Banki blurted out as he fell down and exploded again.

Momo collapsed from the strain of this battle. "I've already used up too much energy. But I still have to help the others.", she pulled herself back to the battlefield.

At said battlefield, Shinya and Bara Guard 2 were locked in a battle of their opposing beams. "It's no good.", Shinya wheezed. "He's too powerful." His concentration broke, with Bara Guard 2's beam overpowering and knocking him back.

"Let's try attacking while he's distracted.", Hiroto suggested as he pulled out his Rocket Dagger. "Freezing Dagger!" Mission 2! Sure enough, Bara Guard 2 pulled out his own dagger, surrounding it with ice to counter Hiroto's attack. "Now, Kaito!"

"I've got it.", Kaito nodded, as he activated Kiva Arms' Au Lait function. Come On! Gabu gabu gabu!

A bat like creature appeared, attacking Bara Guard up close and disorientating him. "Alright! Kivatte go!", the bat commented as he slashed with his wings at the Machine Beast, before vanishing as quickly as he had appeared.

"Choriki Dynamite!" Momo leapt in, rotating forward and causing major damage to the Machine Beast, who decided to teleport out rather than risk further damage. Mom collapsed from the strain of her fight, reverting to normal. "Looks like, I managed to get rid of them.", she managed to whisper before passing out.