As Lin Luo and the Dark King joined forces to attack the Evil King, Sky City also entered a state of emergency preparedness. A piercing alarm sounded from the twelve floating cities surrounding the main city—alarms personally set up by Super Bell Sound, receiving signals via satellites positioned externally. Centered on Sky City, the warning radius extended up to one hundred kilometers.

Information gathering was done visually, converting captured people and objects into combat power numerical values through precise data modeling. Based on these combat values, the alert levels were temporarily divided into seven tiers. Levels below four were within the scope of what 'they' could handle; level five meant facing a significantly arduous battle. Level six signaled a near-certain death scenario, and level seven... that was an insurmountable rank.

And at this moment, the lowest alert level across Sky City registered at five!

"Damn it, how could this happen!" Super Bell Sound was the first to react the moment the alarms blared. She had just finished an experiment that lasted three days and nights and was finally about to rest, yet she was jerked awake without even a moment to close her eyes. When she saw the footage and combat values relayed by the alarm system, she could hardly believe it.

Since these alarms were first created, she had heard level five alerts before, and even level seven alerts. However, those so-called level seven alerts were triggered by Evangeline, not by this—this swarm, countless as ants, surging in from all directions—the real enemy!

The seventh floor main hall of Sky City, after being modified by Super Bell Sound, had become her primary operational base; she conducted experiments and rested there. Others might find it unbearable, but Super Bell Sound, the 'scientist who sold her soul to science,' not only felt no boredom but was instead utterly exhilarated. Apart from necessary communication with others, she spent over twenty hours a day here, sometimes staying continuously for several days, never tiring of it.

Now, Super Bell Sound was seated before the main control console, her hands—moving at a speed several times faster than that of a normal person, like butterflies flitting through flowers—flying across the keyboard, her face etched with gravity. Beside her, a row of seats held Chacha-Maru and several robots manufactured by Super Bell Sound, all performing the same work.

Their main task was to fully analyze the enemy data, including weaknesses and strengths, and feed this information back to the combat personnel outside to facilitate targeted attacks and defenses.

"Attention, the enemy unit directly ahead numbers around a thousand, Undead type—initial estimate places their strength above Spirit Rank, with thirty percent reaching Mid Spirit Rank, and a very small minority individuals reaching High Spirit Rank, Danger Level Five!" Data analysis was Super Bell Sound's greatest forte. In a matter of moments, she had acquired specific data on a portion of the enemy forces and transmitted all this information via communicator to the recipients outside.

"Directly to the rear, enemy numbers are similar, they are Magical Beast type, and all are aerial beasts—their defense strength is exceptionally high, strength level above Spirit Rank, some individuals reaching High Spirit Rank, Danger Level Five!"

"Four o'clock to the right, approximately two thousand enemies, the Ghost Legion, immune to all physical attacks, their strength is terrifyingly abnormal, multiple individuals at High Spirit Rank. Damn it, how can there be so many? Danger Level Six!"

"Ten o'clock left and right, the enemy force exceeds three thousand—all Orc Legions, strength rating... uh! Spirit, Spirit Rank Peak! Two-digit figures or more at Spirit Rank Peak! No, we are completely outmatched!" Upon seeing the data displayed before her, Super Bell Sound was utterly aghast, naked fear appearing on her face. So many Spirit Rank Peaks—there was simply no way they could hold them off.

"Don't worry, someone is already holding back the Orc Legion for us—it's the Dragon Clan!" Just then, a girl's voice, spoken with absolute calm, came through the communicator in Super Bell Sound's hand.

Hearing this, Super Bell Sound quickly tapped the keyboard. Indeed, having been absorbed in enemy data analysis, she hadn't noticed until now. Thousands of Dragon Clan members had already charged toward the Orc Legions, successfully intercepting their offensive; the two sides were locked in a fierce stalemate.

"Damn it, why are there so many enemies appearing all at once? We didn't even have enough time to prepare, and Teacher Lin Luo isn't even here..." Although the most dangerous enemies were being held back by their strongest defenders, Super Bell Sound still couldn't relax and couldn't help but speak.

In fact, the moment the alarms sounded, the nuclear bombs she had manufactured had already been launched. With the terrifying destructive power of nuclear bombs, they could annihilate the majority of the enemy instantly. However, nuclear bombs required a certain activation time, and that brief window was enough for those High Spirit Rank enemies to 'destroy' the warheads—after all, although most invaders were not human, they were not brainless.

Consequently, not a single nuclear bomb she launched detonated.

"Calm down, Super Bell Sound." The girl's voice came again through the communicator. "We live here; no matter how many enemies come, we must protect this world. This has been unavoidable since we got involved in the God War; the expected situation just arrived a little sooner. Also... you haven't slept for several days doing research. I sense your mental state is extremely tense. I suggest you take a break." "What kind of joke is that! How could I possibly rest at a time like this? Don't worry about me; I have my own ways of adjusting." Super Bell Sound retorted loudly, almost without thinking. Although she knew the other party meant well, and acknowledged her current mental state wasn't suitable for this work, in this state of being surrounded and besieged, how could she ignore it?

If she rested now, there might never be another chance to rest.

The girl on the other end seemed to know Super Bell Sound wouldn't rest and didn't argue. Her calm voice not only encouraged Super Bell Sound but seemed to encourage herself as well. "Alright, then let's each do our part in guarding this place... This is our war; we must win, not lose."

"Mm, but don't overexert yourself. This enemy is truly terrifying. If we really can't hold them, use the teleporter I made to retreat to Sky City. At least without Earth Rank powerhouses, Sky City's defenses are absolute." Super Bell Sound nodded, and then both parties exited the communication mode.

"Chacha-Maru, you take over the enemy data analysis." After ending the call, Super Bell Sound stood up, walking towards the control room exit while speaking to the girl beside her.

Chacha-Maru immediately moved to Super Bell Sound's seat but couldn't help but ask, "Super, where are you going?"

Super Bell Sound smiled back, "I'm going to prepare the secret weapon."

In the courtyard of Sky City, all the girls except Misaka Mikoto were gathered. Rin Tohsaka lowered her communicator, gazing at the faces around her, which were exceedingly grave. "Did everyone hear clearly? The enemy's advance this time is beyond imagination, but we only have one thing to do... Meet the enemy head-on!" Everyone nodded. Although some girls with softer natures showed faint fear in their eyes, not a single one backed down. Just as Rin Tohsaka had said, this was their world, and they had to protect it!

Among these girls, Rin Tohsaka was neither the strongest nor the smartest, but she was the first to follow Lin Luo and had experienced the most in the God War. Usually, everyone might not tolerate this tsundere, who couldn't even operate modern machinery 'flexibly' with her mobile phone, but at this crucial moment of life and death, she did possess a certain degree of authority.

In a large-scale war, Rin Tohsaka might not be capable, but in battles involving teams of a few to a dozen people, her insights could convince everyone. As for the bad habit of making mistakes at critical moments, others would naturally correct it... that would be C.C.

Thus, with Rin Tohsaka as the Commander-in-Chief and C.C. as the Strategist, the two were responsible for directing localized battles, while Super Bell Sound remained stationed in Sky City, managing defense from a global perspective... The girls' first World Defense War had begun!

This was the first time, and possibly the last!

Under Rin Tohsaka's command, everyone's division of labor was very clear. First, Dead Master and Black Saber formed one team, joined by Yan Ye leading one hundred mechanized maids, including herself, equipped with dedicated Gundams, to frontally intercept the Undead enemies. Although they were Undead, they were essentially just skeleton soldiers; once shattered, they couldn't revive, so even technological weapons could be effective. Moreover, Dead Master's fire-based attacks and Black Saber's light-based attacks could inflict massive damage on the Undead.

Next, a team formed by Miyahara Shiori and Misaki Shokuhou, plus another hundred Gundam-equipped maids led by Kuon, was assigned to guard against the Magical Beast Legion coming from the rear. For biological enemies, the abilities of these two were quite suitable. Putting aside Miyahara Shiori's Atom Collapse and Fallen Angel Power, just Shokuhou Misaki's psychic control could achieve the effect of defection. However, High Spirit Rank enemies would likely prove very troublesome.

Finally, a team consisting of Isayama Yomi and Tsuchimiya Kagura was assigned to defend against the Ghost Legion attacking from the right. Both were Exorcism Specialists and naturally best suited for dealing with this type of enemy. However, with their current strength, facing a High Spirit Rank powerhouse would still be extremely difficult. Furthermore, technological weapons couldn't harm ghosts, making the Gundam unit useless if sent. Coupled with the Danger Level Six rating, relying on just the two of them was clearly insufficient, so Nero was added for overall crowd control, along with the healing and protection duo of Konoe Konohe and Sakura Hisashin, just in case.

Rin Tohsaka needed to observe the entire field to make timely adjustments and thus could not engage directly, remaining in the courtyard for the time being. Of course, C.C., the Strategist, also stayed put, and Le Feli could not fight directly either. The banner of the Commander-in-Chief could not fall. As protection, fifty Gundam-equipped mechanized maids remained in the courtyard.

The remaining Saber (presumably the 'little' one) and Yui took the remaining fifty mechanized maids aboard Gundams to fly left and right to support the Dragon Clan. Although the Dragon Clan had numerous members, the enemy numbers were far greater. It would be almost impossible for just a few Spirit Rank Peaks like Ryuu Wansen to hold off more than a dozen Spirit Rank Peak powerhouses. But if combined with Saber's super support capabilities, the balance of power could be pulled to an extremely close level... the Aerial Overlord would surely make anyone's jaw drop.

With the combat teams configured, before they departed, Rin Tohsaka solemnly emphasized that if the situation became untenable, they were to retreat to Sky City; that was their final defensive line. Although Sky City could theoretically defend against any attack below Earth Rank—meaning they should be safe if they hid inside—theory was just theory. According to Super Bell Sound's tests, Sky City's defense against Spirit Rank Peaks was not absolute. Perhaps one or two couldn't break through, but if the number reached multiple entities, it became dangerous. Moreover, who knew if other enemies would appear besides those currently visible? They couldn't just sit and wait; they had to weaken the enemy's strength as much as possible.

In truth, they were somewhat lucky this time because the enemies appeared quite far away, and the timely alarm gave them a small window for preparation. Otherwise, if the enemy had directly air-dropped onto Sky City, facing such numbers, they would have had no option but to huddle inside the main hall.

Of course, this wasn't actual luck, but the home-field advantage granted by the World King. To prevent surprise attacks, invaders who crossed over into this world could not arrive directly at the world's center but were forced to stop at least a hundred miles away—this was a form of balance in the God War.

Watching the girls depart one by one, Rin Tohsaka showed no excitement; instead, her brow was tightly furrowed.

"Don't be too tense. This configuration is the most correct one possible right now. You've done very well," C.C. said upon seeing her expression, her tone full of praise. Frankly, C.C. was a little surprised. When she decided to make Rin Tohsaka the Commander-in-Chief for this battle, she hadn't expected this usually proud girl to exhibit such steadfast decisiveness. Although there were still shortcomings in certain areas, her excellent command talent was fully displayed—analytical and detail-oriented at such a young age, which was quite rare.

"But the gap is too large," Rin Tohsaka shook her head with a wry smile. Although all available combat power had been deployed, the overall strength and individual combat power were vastly inferior to the enemy's; there was almost no chance of victory. It felt less like defense and more like a suicide mission. If it weren't for Super Bell Sound's spatial jump device, she wouldn't dare send so many companions to such a dangerous battlefield.

In reality, Rin Tohsaka didn't know that a large portion of the invaders were already being blocked outside the world by the Dark King's dispatched forces; the two armies were currently engaged in a fierce clash. Otherwise, they wouldn't be facing these Spirit Rank enemies, but unstoppable Earth Rank powerhouses!

At that time, even hiding within Sky City would be useless; it would be a dead end.

Of course, even now, for them, it was still a situation with a ninety percent chance of death!

"I hope Super Bell Sound can bring us a surprise," Rin Tohsaka said heavily, frowning. She knew Super Bell Sound possessed a secret weapon, but activating it on short notice was troublesome. If they could endure that activation time and then use Super Bell Sound's secret weapon as the final trump card, victory wasn't entirely impossible.

"To defeat your past self; the results of the action will manifest in just a few minutes. You're still a little anxious, aren't you?" C.C. stated calmly. Unlike the others, having seen through life and death, she wasn't panicked by the immediate crisis, though her own heart might not be truly calm.

Rin Tohsaka offered a bitter smile. From their past interactions, she knew the person beside her possessed a philosophical temperament, often saying things she didn't quite understand. Previously, she might have puzzled over the meaning of C.C.'s words, but now... she simply wasn't in the mood.

Behind the two, Le Feli remained silent, not speaking a single word from beginning to end. But watching the enemies drawing nearer in the distance, a strange light flickered in her eyes.

Around them, fifty mechanized maids sat within their tens-of-meters-tall Gundams, encircling the three of them. Their massive gun barrels pointed outwards, utterly motionless, like statues. Although they wouldn't be directly involved in the fighting, their mission was no less strenuous than anyone else's, placing immense pressure on them. Fortunately, as robots, they didn't suffer from a loss of mental focus.

At this moment, except for the Orc units already engaged with the Dragon Clan, the other invaders were still several miles away, and the girls were ready. Except for the Black Duo rushing forward at full speed to engage head-on, the Psychic Group and the Yuri Group stood at the edge of Sky City, and then...

"Bridge to the Starry Sky Bridge!" As the girls shouted this command, a massive screen of light instantly extended from the edge of Sky City.

Sky City floated in the air. Except for the Undead Legion attacking directly from the front, the Magical Beast Legion and the Ghost Legion were both aerial units. Not everyone among them could fly, and some were not skilled at air combat, necessitating a suitable platform for fighting. Super Bell Sound had noticed this long ago and had recently created the item that allowed the girls to fight in the air: the Starry Sky Bridge!

This was a curtain of light extending from Sky City. As long as they carried the corresponding device, stepping onto this light screen felt no different from walking on solid ground, allowing them to cope with aerial enemies.

The Starry Sky Bridge was erected, the light screen stretching nearly ten kilometers out. The girls advanced toward the enemy in a vast host.

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