The group of girls snuck their ways into the large prison complex where the rest of the IS Academy girls were. With the help of the U7 counterparts, they were able to sneak past the security measures and locate the cells. Upon arrival, Maya Yamada noticed them and got up from her cell bed.

"Chifuyu, you guys made it out?" She asked.

"With the help from Ichika and Houki with some others" Chifuyu answered, "They told us to rescue all of you while they set things up"

"How?" Maya questioned.

"Let's say that we've been given some devices to unlock your cells" Charlotte exclaimed.

"Great, let's get everyone out of here" Tatenashi cheered.

Using the lockpicking device the U1 counterparts gave them, the rest of the IS Academy Units were freed. Despite the large crowd, they were able to make it towards the exit of the facility. However, an alarm rung as they were leaving, causing everyone to make a run for it. Even though they had a long head start, the super soldiers were able to stop them in their tracks by blasting a shot in front of them. The girls stood in fear as they were face to face with an army of soldiers. Above them, a hovering platform descended, revealing it to be Peter Harrison.

"Well, well, well, it seems that the IS Academy people are trying to escape" Harrison commented, "But it won't work"

"It's not over yet" Rin yelled back.

"Tsk, what could even stop my army now?" Harrison questioned.

Unbeknownst to him, four airborne machines flew over them and landed right in front of him. It appeared to be some form of humanoid machinery armed to the brim with artillery and weapons. All four of them pressed something on the neck area to reveal Ichika, Derek, Sarah, and Houki.

"Ah, so you four have been meddling with my plans" Harrison exclaimed.

"That's right, it's time to end this" Ichika replied.

"You fools, you expect me to be defeated by four humans in mechanical armour?" Harrison asked in disbelief.

"Oh, not just us" Derek added, "We have something for you in store"

"Huh?" Harrison questioned.

"Let's go" The four said, putting their right hands together.

A light shown on each of their gauntlets which caused a mini shock wave to occur and a minor electrical sound could be heard. In front of Harrison's army, 10 giant portals formed, armies walking through each of them. U1 had an army of mechanised soldiers and tanks with the counterparts piloting the largest forms (think of the Machina archetype from Yugioh), U2 had an army of knights, half on foot, half on horseback. U3 had an army of sorcerers, wizards, and mages, all armed with staffs, wands, and tomes. U4 had an army of human-dragon hybrids, showing off their elemental powers. U5 had an army of soldiers armed with syringe guns, gas bombs, and chemical artillery. U6 had an army of martial artists channelling their life force energy. U7 had an army of tech experts using condensed holograms to make weapons. U8 had an army of psychics, energy glowing around them while they were in the air. U9 had an army of space soldiers, also having tanks and spaceships that can be controlled remotely. And U10 had an army of samurai, their blades all glowing with astral energy.

"Looks like we have an interesting party" Harrison exclaimed, "ATTACK"

The soldiers began attacking the dimensional army, and a war has now begun. Luckily, they were in a very secluded area so know innocent civilians would get hurt. However, the IS Units were in the middle of it, so they were not in the safest areas. Running away, they tried to hide, but a bunch of soldiers stopped them.

"You ain't going anywhere" One soldier said.

Before they could attack, the U10 counterparts jumped in front of them and rushed to attack. Derek10 used his reflector shield to launch one into the air which allowed him to kick him upwards. Ichika10 fired a stun laser then bicycle kicked the soldier up and away. Houki10 engulfed herself in fire and propelled herself into a soldier, knocking him down. The final soldier tried to run, but Sarah10 ambushed him and threw him at a tree.

"Wow, they are very strong" Charlotte commented.

"Ja, and that technology looks amazing" Laura agreed.

As they made it to a safe point, everyone looked ahead to see the carnage that was unfolding. Machines were fending off, the martial artists were easily beating them, the dragons, psychics, and magic users have the flight advantage. Even the knights were skilled enough to take them down. What intrigued most people were the chemical artillery and condensed holograms.

"How exactly do those holograms work?" Chifuyu questioned, "I need to learn it from them"

"I'm just wondering on what chemicals they use" Tatenashi exclaimed, "I'm pretty sure that chemical warfare is illegal"

"I mean, it is but they're from another dimension, so it might be different there" Chifuyu pointed out.

"That is true" Tatenashi agreed.

While the armies were battling, Harrison attempted to make a retreat. There, he was stopped by the main four.

"It's over Harrison, you can't stop us" Sarah told him.

"Oh, but I can" Harrison said, pulling out a syringe.

Injecting himself, Harrison mutated into a large bio-weapon, similar to Albert Wesker in his infected form. In this form, he grew a giant tentacle arm and gained extra muscle capacity. Charging, he attacked the four, but they managed to dodge.

"Damn, it's a good thing we have the antidote" Derek commented.

"Yeah, we just need him into the trap" Houki replied.

Firing off rounds of blasts, the four began leading Harrison away from the war. The IS Units followed after them to see what would happen as the battle was starting to settle down in favour of the Dimensional Army. Harrison sent many attacks but the four managed to dodge most of them. Derek moved behind him to fire a concussive blast which propelled him closer to the trap. Nearing the chemical trap, the U5 counterparts were ready to activate it.

"This is it" Ichika muttered as he punched Harrison closer to the trap.

Harrison however managed to manoeuvre his way around Ichika's blows and hit him with a tentacle strike, sending the boy away from him and colliding through two trees before stopping on the third.

"ICHIKA" Houki yelled.

Distracted, Harrison was laughing, not realising that Derek and Sarah were flying at high speed towards him. Knocking him off the ground and into the trap area, the U5 counterparts sprayed the antidote, removing him of his mutations, and caging him. Houki flew over to Ichika unconscious body, opening his helmet along with hers.

"Ichika, please, wake up" She cried, holding his head up while tears welled up in her eyes. This brought back horrible memories from when he nearly died during a mission. The other girls knew this and were devastated too. However, as luck decided to help her out, Ichika's eyes opened.

"Ichika, you're alive" Houki said happily.

"Heh, it will take a lot to kill me now" Ichika replied.

Houki swiftly captured his lips with her, not caring that the others were watching. Obviously, the jealousy was through the roof.

"What, when did she get him?" Charlotte questioned, "Sacre bleu"

"What is the meaning of this? I thought Ichika was into me" Cecilia exclaimed.

"That pervert, of course he would choose her over me" Rin said in anger.

"How dare she steal my wife" Laura muttered.

"Oh my, I guess he really does love her, oh well, I had my chance" Tatenashi sighed.

"It may have not been me, but I'm happy for him" Ran said, knowing fully well that Ichika liked Houki.

After breaking the kiss, Ichika spoke. "You know that the others are watching, right?" He exclaimed.

"Doesn't matter, as long as you're still here, I'm happy" Houki replied, earning her a chuckle from her boyfriend. Later on, the special forces arrived to take away Harrison and lock him up. The rest of the dimensional counterparts returned to their rightful homes, and the group were happy that they saved the day. The harem was obviously still jealous, but that's another story. Or is it?