Riser brought all of them to the training ground that he had made on this villa.
Unlike the indoor training ground in his castle, the training ground on his villa was outdoor, like an area in the martial arts school.
Still, unlike the Japanese design he used on his villa, this one had a Chinese design.
Or... was it mismatched?
Anyway, it had various types of training grounds, so everyone could focus on their training, depending on what kind of training they planned to do.
Still, to show the power of firearms, he decided to take them outdoors since he was afraid that the power of the weapon might destroy the facility.
As for everyone, they could only follow him.
Riser was their master; even if his idea was kind of unique, they still needed to follow his whim, but more importantly, they would be lying if they weren't curious.
"Onii-sama, are all those the firearms you mention?"
Riser placed all the firearms he had collected previously on the table. He always wanted to make Marion, Burent, and Shuriya powerful, so he collected all of them.
Frankly, the fastest way for someone to become powerful was to get their hands on the Sacred Gear, the items with powerful abilities bestowed upon Humans by God of the Bible.
They might be a devil, and they might not be able to be born with this item, as it was only bestowed by God to the humans, but they could rob it from the humans.
As for the methods?
Riser might be clueless at first, but there were many humans who had Sacred Gear. He could do an experiment, trying one-by-one methods like how a researcher did an experiment on a white rat.
—or should he wait until the peace of the three factions began?
Nevertheless, the Sacred Gear wasn't as beautiful as it seemed since, sometimes, it would take away the lifespan of the user.
The devil might have a long lifespan or even immortality, but it didn't mean that they couldn't die.
Moreover, there was a problem with whether the Sacred Gear was appropriate or not.
If he gave an example, it was like how someone with B type of blood couldn't receive a donor from A type of blood.
While he wasn't sure whether Sacred Gear would work that way, he might as well have prepared for the worst.
So, with all of that, using the combination of a weapon and magic was definitely the aptest for the devil.
Nevertheless, let's return to the firearms that he had prepared.
There was a Luger P08, M134 "Minigun," OTs-48, and FIM-92 Stinger on the table.
All of them have been modified slightly by him.
Still, the girls had to say the firearms were kind of novel since it was quite rare for them to see one, especially in the Underworld, where most devils could use magic.
If it wasn't for the reincarnated devil, the existence of firearms might still be an alien for the majority of devils.
Still, even if firearms were rare, for Riser, it was easy to acquire them.
Now, why firearms?
Riser was going to show them now.
"Wow, this is so big~!"
Serafall held the M134 "Minigun" with a chainsaw grip attached above the receiver for hip-fire portability.
Unlike the original, its box magazine was attached below the weapon, although no feed chute was present connecting the ammunition box to the feeder-delinker.
Serafall didn't know whether it was deliberate or an accident but tried to pull the trigger in his direction.
"..." Riser.
"Eh? Eh? Why is nothing coming out?" Serafall was confused.
"...take this down first.'
"Uwaa~! How stingy~!"
*Thump! Thump! Thump!*
While Riser didn't think that he would be hurt by a mere machine gun, his heart was still beating so fast. Still, to ease his heart, he took the Luger P08 in his hands, then said, "Serafall-sama, can you fly for a moment?"
"...you want to make me a living target?"
"Is that not okay?"
"..."
Serafall stared at Riser, squinting her eyes, wondering whether this guy was teasing her or joking around.
Yet, Riser was honest and clearly showed his request through his eyes. "Are you not curious about what I will do with firearms? I will show you."
"..."
Serafall was curious, but she felt weird when she had become a living target for his example. Still, she thought for a moment before she nodded. "Okay." Anyway, it was just a firearm, and she didn't think it would hurt her. She spread her devil wings and then soared into the sky.
"Is this enough?"
"Try to fly right and left."
"Okay."
Serafall flew right and left while mocking him. "Riser-chan is an idiot~! Riser-chan is a big idiot~!"
"...." Everyone.
However, Riser ignored Serafall's mock and pulled the trigger on his pistol.
"Eh...?"
Not only Serafall but everyone was surprised by his actions.
"Huh? Where did you aim? Why did you aim there? Wait~! Don't tell me... is Riser-chan worried about my safety~?" Serafall seemed to be in shock before she was moved.
"I am sorry, Riser-chan~! I am sorry for mocking you~!"
It seemed her position on his heart was still important that even though he knew the gun wouldn't hurt her, he didn't want to shoot her.
Serafall couldn't help but feel moved.
Yet, suddenly, a scene that surprised them happened.
The bullet that flew in a straight direction suddenly changed its direction and flew at Serafall at a faster speed!
*Bang!*
The sonic boom echoed through space and startled all of them.
"What—?!"
Serafall was the most startled of all since she was the target, but she quickly dodged.
Yet, the bullet kept following her!
How?
How did the bullet move like a guided missile?
No matter what Serafall tried to dodge, the bullet persisted, like a hound dog that followed her. In the end, she felt a bit annoyed and created a barrier.
Then—
*Bang!*
An explosion that was enough to swallow Serafall's body happened, but naturally, it did nothing to her as Serafall created a barrier to protect herself.
However, this explosion was enough to surprise all of them!
After all, this explosion was powerful.
It might not be as powerful as Yubelluna's explosion, but there were several bullets on the Luger P08, and if all the bullets exploded one after another?
Moreover, this speed...
They were sure that most devils were unable to avoid it!
The speed of the bullet was enough to break the sound barrier, and among the devils, it was rare to see someone who had a speed of sound.
If there was, it was only those devils whose ranking was at the top.
As for Serafall, this woman was one of the strongest devils; breaking a sound or two was nothing for her.
Nevertheless, even if Serafall was powerful, she couldn't help but feel surprised by that sudden explosion. Her heart was still thumping now, especially the penetration ability of the bullet.
If her barrier was a little weak, then her barrier would be broken!
Serafall wanted to complain, but—
Riser suddenly held OTs-48 Stinger and aimed it at Serafall.
"Wait~! Wait~!"
However, Riser didn't wait.
*BOOOOM!*
It was like the sound of a cannon!
It was like something shot from a tank!
Or rather, it was like a laser beam!
Serafall was even more panicked!
"RISER-CHAN~!"
*BOOOOOOM!*
The explosion happened, and the impact was enough to blow them away, which made their hearts realize the terror of the firearms.
Fortunately, Riser made a barrier, so no one was affected by the impact, but—
"RI-SER-CHAN~!"
Serafall was furious and wanted to give him a good scolding, ready to start her revenge, yet—
Riser held his M134 "Minigun" and aimed it at Serafall.
"...." Serafall.