Extra Chapter, because I am that awesome.
Enjoy.
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Serafall Leviathan is the older sister of Sona Sitri and the eldest sibling of the Sitri Family. During the war between the Old Satan Faction and the Anti Satan Faction, she fought as a member of the Anti Satan Faction that opposed the Old Satan Faction, a conflict that ultimately ended in their victory. In the aftermath, she was promoted to the position of Satan Leviathan, a promotion that cost her the right to remain the heir of the Sitri Clan.
She is the most powerful Devil the Sitri House has ever produced, naturally born with Satan-class demonic power and talent. During the Devil Civil War, she fought Grayfia to a standstill for ten days, with neither side gaining any clear advantage.
Later, when she ascended as the next Leviathan, she was universally recognized as the strongest female devil, surpassing even Grayfia and Roygun Belphegor, both of whom held the Queen and King Pieces while also being Satan-class.
Her power was so overwhelming that Sona once told Yusuke that if her sister "glitters," a small country like Japan would be wiped out several times over.
Unlike her serious younger sister, Serafall is cheerful, friendly, and carries a distinctly childlike personality. Many people knew her and Sirzechs as sis cons, but those who truly knew her understood that, compared to Sirzechs, she was far more extreme in that regard. Her attachment to her sister ran so deep that upon learning of Sona's engagement, she made a reckless move that nearly caused serious trouble with Sona's fiancé's house.
Among the Four Great Satans, she was the one responsible for foreign relations, and because of her overly cheerful, friendly, and bubbly temperament, she excelled at the role.
She had been away for several months this time due to a diplomatic mission to the Norse Mythology.
The moment she returned and learned that her sister was in the Underworld, she ignored her parents and ran straight toward her little sister's room, calling out loudly, "Sona-tan~! Where are you?!"
"Sona-tan~! Sona-tan!" She ran down the hall in skipping steps, her pink skirt flying up and briefly flashing her white panties as she hummed her sister's name. Despite being hundreds of years old, nearly the same age as Grayfia, Serafall looked far younger than the latter.
She resembled a beautiful girl in her late teens, with black hair tied into twin tails and bright blue eyes. Her figure leaned toward the childish side, similar to Asia's, though paired with an impressively generous chest.
"Onee-sama?" A headache was already forming as Sona stepped out of her room, one hand pressed to her head in helpless resignation. "You came back?" Meeting her sister at this moment felt like the worst possible timing. If she had known her older sister would return this early, she would not have come to the Underworld at all.
With how annoying and clingy her sister could be, a scene was almost guaranteed if Serafall learned that she was in a relationship with a man.
"Sona-tan, did you miss your lovely dovely onee-sama?" Serafall stood right in front of her, spinning the magical girl baton in her hand as she twirled in place. When she finally stopped, she flashed a peace sign with both hands and winked at her.
"Onee-sama, can you be more serious?" Sona's lips twitched.
"Shh~!" Serafall brushed off her seriousness and skipped forward to hug her. "I miss my Sona-tan so much." She pressed her cheek against Sona's face, rubbing against it happily.
Suddenly, her eyes widened as she glanced down at her sister. "Hmm, did you gain some weight?" She felt that her sister's body had grown a little softer, her small breasts seemingly an entire cup larger, and her waist slightly curvier as well. Had her sister gone through a second growth spurt?
"...Onee-sama, that's rude," Sona stared at her sister with a flat, blank gaze.
"Sniff! Sniff! Wait!" Serafall's nose twitched as she let go of Sona. She circled around her while sniffing exaggeratedly. All of a sudden, her eyes darkened, an icy blue aura erupting from her as she spoke, "Who is it? Who is it?!"
The overwhelming aura radiating from her caused the entire estate to tremble, frightening the servants and alarming everyone nearby.
"What are you talking about?" Sona's heart skipped a beat, but she kept her expression steady and asked with a frown.
"Who is the man who tainted my Sona-tan?! Who is it! My Sona-tan is no longer pure!" Serafall grabbed both of her shoulders and shook her, blue eyes staring at her younger sister with desperate intensity.
For some strange and completely nonsensical reason, Serafall possessed the ability to tell whether her sister was a virgin simply from her scent. She even had a name for it, the virgin scent. Earlier, when she touched her sister's body and noticed the subtle curves, suspicion crept in. The moment she sniffed her, the conclusion was clear.
Sona's virgin scent was gone!
"My Yuri lovely dovely dream with Sona-tan is gone! Who did it?! I am going to kill them!" Serafall collapsed onto the floor. She looked like a man who had just discovered, after twenty years of marriage, that all four of his children belonged to his four best friends instead.
"Sona-sama! Serafall-sama?! What's going on?" Under Tsubaki's lead, Murayama, Aika, and the other peerage members came running, faces full of alarm.
They reached Sona's side and asked, clearly confused.
"Tsubaki-tan, who is it! Tell me who it is!" At the sound of Tsubaki's voice, Serafall suddenly blurred forward and appeared right in front of her, her face barely an inch from Tsubaki's. Before Tsubaki could even process what was happening, Serafall's expression darkened as she sniffed. "You too! You're no longer pure?! Could it be the man who defiled my Sona-tan tricked you as well?!"
"Unforgivable! Not only did he steal my Sona-tan, but he's also meddling with other women, too!" Her eyes shifted to Aika and Murayama. She didn't know who they were, but from their appearance, they seemed to be Sona's new peerage members.
With a single sniff, she confirmed they, too, were no longer virgins. Her expression became desperate and heartbroken.
Mechanically, she turned to the other peerage members and, thankfully, they were still virgins. She rushed to Momo Hanakai and demanded, "Momo-tan, tell me who is the man who tricked Sona-tan!"
"Ehh... Serafall-sama? I... I..." Momo instinctively stepped back, but Serafall's hands grabbed her firmly, holding her in place. She glared at her with desperate eyes and hissed, "Tell me!"
Momo and the other girls grew frightened, their bodies trembling under the insane pressure the Satan was radiating. Finally, unable to withstand it any longer, Tomoe Meguri spoke in a rush, "Let her go! I know who it is! It's Yusuke Aoki!"
"Tomoe!" Sona, Tsubaki, Aika, and Murayama glared at her at the same time, fixing her with looks that promised to tear her into tiny pieces and burn her soul in hellfire for all eternity!
"Yusuke Aoki? So the man who stole Sona-tan's purity is named Yusuke! From his name, he must be Japanese!" Serafall released her grip on Momo, muttering with a blank expression. Blue aura exploded from her, and ice rapidly spread beneath her feet, freezing the entire space.
Just when the girls thought she was about to go berserk, a blue magic circle enveloped her, and in the next instant, she teleported away.
Thud!
"She… she's gone. That was so scary!" Tomoe collapsed onto her butt, patting her chest. She didn't get a chance to relax, however, as sharper, more terrifying gazes fixed on her, sending chills down her spine. Lifting her head, she forced a smile and said, "Sona-sama?"
...
"Yusuke, what do you think about the political situation in the Underworld?" Sirzechs asked, sitting on the green grass. Although it was a bit unusual to ask something like this of a teenager, Yusuke carried a maturity beyond most his age.
'Why is he asking me something like this?' Yusuke wondered, gazing at the sky. "From what I can feel, it seems there's some balance between the old-fashioned nobles of the Great King Faction and the Satan Faction."
From what he had learned, it seemed that although the nobles and high-ranking devils officially accepted the peerage system, many of them still looked down on reincarnated devils, treating them as inferior. Some even went so far as to openly abuse them.
While the laws stated that a reincarnated devil could be promoted to a high-ranking position and even hold a peerage, in reality, such cases were extremely rare.
The most notable example was Rudiger Rosenkreutz, who also ranked seventh in the Rating Games.
But this was only on the devils' side. The Underworld was shared with other beings as well. It was divided into two main regions: the Devils' Region and the Fallen Angels' Region. Beyond those lay the Realm of the Dead, where Grim Reapers and Gods of Death, like Hades, resided.
"Indeed, and what do you think needs to change?" Sirzechs glanced at him from the side and asked with a smile.
"Realistically speaking, if my goal were to change the Devil race's future for the better, I would probably make some extreme choices, like mercilessly purging all opposition and forcing reforms through," Yusuke answered nonchalantly. With Sirzechs' power, he could clearly do something like that, but he was far too soft to take such an approach.
That said, Yusuke probably would not do it either. He was not some Chinese main character who only knew how to kill and conquer.
"That's quite an extreme view," Sirzechs fell silent for a moment before speaking. For some reason, Yusuke's perspective reminded him of Ajuka Beelzebub.
"Yeah, but we're only speaking hypothetically," Yusuke nodded. Anyone watching from the sidelines could throw out radical ideas. It was the same as readers casually saying a character should just massacre a race or wipe out a city, while reality was far more complicated.
"Don't you think that would be the act of a tyrant? No one would ever love a tyrant," Sirzechs wondered aloud.
"Well, a leader doesn't need to be loved. They need to lead and take responsibility," Yusuke shrugged. "If the goal is to push reforms, then sacrifice is always part of the process. A leader afraid of criticism or one who is overly kind will only hurt their people more in the long run."
Devils and humans were fundamentally different, and their social structures reflected that. No matter how similar they appeared, devils still revered power and bloodline. To change that structure and make everyone feel more or less equal, as Sirzechs and his followers hoped, they would need to be far firmer and far crueler.
"A leader doesn't need to be loved… heh, Yusuke-kun, you're much wiser than you look," Sirzechs said, standing up with a sudden laugh. He patted Yusuke's head, ruffling his hair, then turned around and said, "It's getting late. You should go back to sleep."
[He's basically saying you look dumb! See, even others know you're stupid!] The system didn't miss the chance to jab at him.
"Tomorrow I'll be returning to work."
"You're leaving?" Yusuke called after him, looking back.
"Yeah, but I'll see you soon. In a few weeks, I'll visit the human world, and I'll be counting on you to show me around!" Sirzechs waved his hand and started walking away.
"Sirzechs!" Yusuke suddenly called after him. "Can I really call you brother?"
"Hahaha! Of course! You're already my Otōto!" The question made Sirzechs pause for a moment before bursting into loud, cheerful laughter. He waved his hand once more and left.
[That's cringy. Why are you getting so chummy with him?] The system suddenly asked.
'Because I want to,' Yusuke snorted coldly at her. He wanted male friends, too. He didn't have a single one. Sirzechs seemed nice and easygoing. It could be fun to hang out with him. They could grab a drink sometimes, play games, maybe go on a late-night drive, and talk about stupid stuff.
[Whatever…] The system dismissed his words before suddenly asking, [Why is it so hard to pronounce the word "rough" twice in a row?]
'What's so hard about it?' Yusuke asked, surprised, and tried, 'Rough! Rough!'
[Good boy.]
'…' Yusuke.
**
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