Very soon, Kaiser and Nagisa Akatsuki arrived on the seventh floor and parted ways in front of their respective apartment doors.
Kaiser took out the apartment key that had been given to him in advance, opened the door to Room 705, and walked in.
Passing through the entranceway into the apartment, what entered Kaiser's field of vision was a three-bedroom, one-living-room layout, equipped with a kitchen, dining area, washroom, and bathroom.
If a whole family were to live here, it would feel a bit cramped, but for a single occupant, the space was overly spacious.
"Not bad. At least it's much better than the apartment I started with in the previous world."
That apartment had a layout where entering through the door led directly into the room, with only a single restroom that included a shower—compared to the current place, it was at least ten times worse.
"It's just a bit empty."
Looking at the bare room without a single piece of furniture, Kaiser found it hard to believe that a family had lived here before.
Of course, someone had definitely lived here previously. Otherwise, how could he have been so lucky as to find a vacant apartment for rent right next to his surveillance target?
The Yamadas that Nagisa mentioned were undoubtedly relocated by people from the Lion King Organization. Otherwise, Kaiser, as a monitor, couldn't possibly have just happened to live near Nagisa and become her neighbor.
"Better get some furniture first."
Kaiser had no intention of sleeping on the floor tonight.
Thus, he pulled out his phone once again and began shopping online.
When he left High God's Forest, the Lion King Organization had given him an allowance as necessary funds, totaling ten million yen.
Though it was yen, ten million still equated to several hundred thousand yuan in purchasing power. As long as he didn't splurge on luxury goods like Erica, Rias, or Claudia, furnishing the place with a cozy and livable feel would pose no problem at all.
Kaiser went on a spree, buying a sofa, coffee table, curtains, bed, wardrobe, and other furniture—enough to fill every space except the kitchen.
As for the kitchen utensils... though he wasn't incapable of cooking—otherwise, he wouldn't have managed living alone in the past—being able to cook didn't mean he liked it. Especially now, as the Librarian of the Fantasy Library, he had long lost all hope in his culinary skills and simply didn't want to cook anymore.
When in the world of Asterisk, studying at Seidoukan Academy, he could dine in the cafeteria.
In the High School DxD World, since Kuroka and Asia around him weren't great cooks, Kaiser had cooked once or twice, but most of the time the meals were handled by Kuroka's familiars or eaten out.
In the Bleach world, the Shinō Academy he attended had a cafeteria. After joining the Gotei 13, the 3rd Division headquarters also had its own cafeteria. And after Hinamori Momo joined the squad, Kaiser didn't even have to go to the cafeteria—this dutiful vice-captain always personally made meals and delivered them to him.
As for in the world of Campione… he was a king. Why would he need to cook?
Either he ate out, or Mariya Yuri and Liliana would personally prepare delicious meals for him. Even when visiting other countries, the local magic societies would immediately prepare grand banquets for him. There was simply no need for him to cook.
Because of all this, Kaiser had nearly forgotten how to hold a spatula. Naturally, there was no way he would cook now.
Since he wasn't going to cook, there was no need to buy kitchenware.
Next, Kaiser bought daily necessities and casual homewear, spending nearly half of the allowance given by the Lion King Organization before finally stopping.
"For the delivery address, I'll just fill in this apartment building… hopefully it won't occupy the elevator too long this time."
Thinking of the conversation that had occurred in the elevator earlier, Kaiser couldn't help but chuckle.
After completing all this, Kaiser walked over to the window and opened it.
"Chirp chirp chirp——"
A few small birds chirped noisily as they flew by, just happening to enter Kaiser's line of sight.
"Come here."
Kaiser beckoned with his hand, and one of the small birds suddenly froze midair and flew toward him.
"You'll serve as my eyes for now."
Kaiser gently stroked the bird's feathers, then activated the Authority of the King of Beasts, releasing a subtle power that flowed into the little bird's body.
In the next moment, the bird's gaze changed, and an unusual aura began emanating from it.
Though its appearance didn't change, under the enhancement of the King of Beasts' Authority, this little bird had already transformed into a type of magical creature, becoming a divine familiar under Kaiser's control.
"Go."
Kaiser released the bird, letting it fly to the neighboring Room 704, where it landed on the window.
Upon seeing this, Kaiser closed his eyes, letting his senses merge with the bird via the Authority's connection.
In that state, the scene visible from the bird's view inside the window was instantly projected into Kaiser's mind.
"Hm~ hmm hmm~~~"
In the vision, Nagisa, who had just returned home, was in her room, taking off her school uniform, revealing her slender, fair limbs.
She was humming as she changed into home clothes, but suddenly stopped her actions at one moment.
"…Why does it feel a little strange?"
Perhaps sensing something, the girl's gaze shifted toward the window.
But at that moment, the bird that had been resting there had already flown away, so naturally, she saw nothing.
"How strange…"
Nagisa muttered and then continued dressing.
"That was close…"
Kaiser, standing by his own window, recalled the bird and scratched his face.
"As expected of a Sword Shaman with high-level medium qualifications and strong spiritual power. Though she's not on Mariya Yuri's level, her spiritual sensitivity is no joke."
Kaiser had thought that after becoming like this, Nagisa would've lost her qualities as a spiritual ability user, but to his surprise, her spiritual sense was still intact. That was quite rare.
"Looks like I'll have to be more careful with observations from now on."
Kaiser came here precisely because he was puzzled by Nagisa becoming the Fourth Primogenitor.
He didn't know how things had turned out this way.
In the original story, it was clearly Nagisa's brother, Kojou Akatsuki, who became the Fourth Primogenitor. Why had it become her now?
Could it be a mistake?
After having that thought, Kaiser immediately denied it.
The Lion King Organization was always thorough with intelligence work. At the very least, when it came to who between Kojou and Nagisa had become the Fourth Primogenitor, they couldn't possibly have gotten it wrong.
Not to mention, in the original work, the incident that made Kojou become the Fourth Primogenitor also involved interference from the Lion King Organization. It should be the same this time.
Since that's the case, the Lion King Organization couldn't have made a mistake about who the Fourth Primogenitor is.
Unable to figure it out, Kaiser finally decided to come see for himself. Taking on the Lion King Organization's surveillance task was merely incidental.
Though he didn't know what kind of game this matchmaking agency was playing by choosing him as Nagisa's monitor…
It surely couldn't be just because he possessed latent power capable of contending with a Primogenitor, right?
Others might not know, but Kaiser, who knew the original story, understood perfectly: the Lion King Organization's official reason for assigning monitors to the Fourth Primogenitor was surveillance, but the real reason was to provide a Sword Shaman to serve as a medium and trigger the Primogenitor's awakening.
Could it be that he was chosen for the same reason?
But he wasn't a spiritual medium, was he?
"I'm going to find out what exactly you're planning."
Muttering this, Kaiser turned his gaze to the shoulder bag behind him.
He took down the bag, unzipped it, and pulled out its contents.
What appeared in Kaiser's hands resembled the main wing of a fighter jet, approximately 120 centimeters in length. Straight, joint-like engravings were etched across it like patterns, and the whole thing shone with a silvery gleam under the sunlight—a heavy long blade made of smooth metallic curves.
This heavy silver blade was currently folded in a way that stored its edge, exuding a strong mechanical feel.
Looking at this silver greatsword, Kaiser's thoughts drifted back to that day.
...
"What is this?"
In the spacious main shrine, a box containing the silver greatsword appeared before Kaiser.
This was something the Three Saints had just handed to him.
"This is a farewell gift for you, and also a martial divine tool to enhance your power."
One of the Three Saints slowly spoke, causing Kaiser to raise his brows.
Divine Armament—naturally, this was not the same as the God-Slaying tools wielded by Campione.
So-called Divine Armaments were weapons developed and researched over many years by the Lion King Organization, crafted using modern technology, ancient knowledge, and various techniques from curses and magic—anti-demon armaments.
Though developed by the Lion King Organization, some of these Divine Armaments used materials or cores inherited from the mythological era, while others were directly modified from such artifacts. Even those not linked to mythology employed extremely rare techniques or materials and were incredibly powerful.
Among these Divine Armaments, some even possessed special abilities capable of threatening a Primogenitor.
The silver greatsword before Kaiser was one of them.
"Among the Divine Armaments developed by the Lion King Organization, there is one type of armament specifically designed to suppress and paralyze demon armies, known as the Heavy Demon-Purging Bow Type Six."
Another of the Three Saints spoke up at just the right time.
"The Heavy Demon-Purging Bow Type Six has two forms: normally in the form of a sword, but it can also transform into a bow. In bow form, it can use special spell-type arrows to fire high-density chanting spell bombardments. In sword form, it is engraved with a simulated space-severing technique that generates an absolute defense barrier nullifying physical attacks, and its blade can sever spatial connections."
The last of the Three Saints continued.
"Due to difficulties in mass production, this Divine Armament is now planned to have its functions divided into two, producing the Heavy Demon-Purging Bow Type Six and Heavy Demon-Purging Sword Type Six," the one who spoke first resumed explaining. "And considering the arduous nature of your mission, we decided to modify, enhance, and reconstruct the Heavy Demon-Purging Bow Type Six with rare technology and materials, to custom-craft a personal Divine Armament for you."
"That is the Divine Armament before your eyes."
"Its name is—Type-100 Heavy Armament Demon-Slaying Blade—'Silver Radiance Qilin'."