"Human beings are strong because we have the ability to ge ourselves."— Saitama, One Punch Man

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  With the Three Fas' Peace ference cluded, Roy returo his peaceful daily life.

  One day, at the Occult Research Club...

  "Starting today, I'm the new advisor of the Occult Research Club!" Serafall decred, standing up and striking a pose with her hands on her hips.

  Roy, Rias, Sona, and the irls were all present.

  Sona sighed, shaking her head at her sister's antics.

  "What's going on?" Rias asked, looking at Serafall in fusion.

  "I wao see more of Sona-, so I asked to be your advisor," Serafall expined.

  "And to discuss magical girls with Roy!"

  "By the way, Roy, is that Madoka Magibsp;manga you mentioned finished?" she asked, boung over to Roy, her eyes sparkling with anticipation.

  "Uh... yes, it is. But as a Maou, shouldn't you be busy with other matters? How do you have time to be an advisor?" Roy asked, puzzled.

  He remembered that Azazel was supposed to be the advisor. Why had Serafall taken his pce?

  Of course, if it had been Azazel, he would have objected. After all, Kuoh Academy was an all-girls school.

  "I am quite busy, so I won't be here often," Serafall admitted, then held out her hand expetly.

  Roy sighed and pced the pleted manga in her hand.

  Serafall squealed with delight and immediately sat down to read it, ign everyone else.

  "Roy, are you sure it's okay to let her read that?" Mine whispered, nudging him with her elbow and gng at Serafall.

  She had already read the manga. It was a good story, but uypical magical girl stories, Madoka Magibsp;was quite dark and disturbing.

  Roy had called it a "healing" anime.

  After watg it, she had been furious. Healing? she had thought. More like depressing.

  Would Serafall, who feared nothing, be affected by this dark tale? Would she snap and try to destroy the world?

  "Haha, it's fine. I'm curious to see her rea," Roy chuckled, anticipating the chaos that might ensue.

  "I just hope Serafall-sama doesn't cause too much trouble," Rias said with a worried sigh.

  They all watched as Serafall read the manga.

  At first, she was all smiles.

  But then, her expression clouded over.

  Her smile vanished, and her face became serious.

  As she tinued reading, tears welled up in her eyes.

  Soon, she was sobbing untrolbly.

  Sona had never seen her sister cry like this before and was quite ed.

  Serafall finally calmed down after finishing the manga, though she remained in a daze.

  Roy approached her and patted her shoulder.

  "Serafall-san, are you alright?"

  "It was amazing!" Serafall suddenly shouted, startling Roy.

  "Roy-kun, your manga is incredible! It's unlike any magical girl story I've ever seen!" she excimed, grabbing his haedly.

  "Um... I'm gd you liked it," Roy replied, surprised by her rea.

  He had expected her to be upset or even enraged, not overjoyed.

  "Hey, hey, let's adapt it into an anime! And then make a live-aovie!"

  "I'll py Madoka, and Sona- py Homura!" Serafall suggested, her eyes sparkling with excitement.

  "Uh... well..." Roy g Sona.

  Sona was facepalming, clearly exasperated by her sister's antics.

  "That's not a bad idea," Roy said, pying along.

  "Yay! Thank you, Roy-kun!" Serafall cheered, hugging him tightly.

  Sona and Rias stared at them in disbelief.

  They couldn't believe that Maou Serafall, was ging to Roy and ag cute.

  No one would believe this if they told them.

  ...

  Time flew by, and a month passed in the blink of an eye.

  Summer vacation had arrived at Kuoh Academy.

  As per tradition, Roy and Rias had to return to the Underworld with their peerages.

  They gathered to discuss their pns.

  "Roy, what are we doing this summer vacation?" Rias asked with a smile.

  "Hmm..." Roy pondered for a moment. "How about we visit your family first, then we'll go to my sister's pce together."

  "And finally, we'll have a training camp. What do you think?"

  Rias nodded in agreement. "That sounds like a good pn."

  The girls were excited.

  "Going to the Underworld while we're still alive is a bit nerve-wrag, but I'll face it with the resolve of someone fag death!" Asia joked.

  "Are we going to hell?" Sheele asked with a fused tilt of her head.

  "Silly Sheele, the Underworld is just where Devils live. It's not hell," Chelsea expined patiently.

  "We're going to meet Buchou's sister? I'm so nervous," Aika, Murayama, and Katase said in unison. It was their first time visiting the Underworld.

  "Will we see Grayfia-sama when we go to the Underworld?" Alice asked, raising her hand.

  "Of course. She's been wanting us to visit," Roy replied with a smile, patting Alice's head.

  "Special training, huh?" Koneko mumbled, petting her cat.

  She stood up and approached Roy.

  "Roy-senpai, please make me stronger. I don't want to be a burden," she said with a determined look.

  Roy was momentarily surprised, then smiled. "Koneko, you're not a burden at all. Don't worry, I'll make you stronger during the training camp."

  "That's right, Koneko. You're not a burden. You're my precious servant," Rias added, hugging Koneko.

  Koneko had been feeling insecure because she hadn't been able to tribute mu ret battles.

  But her resolve to bee stronger was unwavering.

  And it wasn't just Koneko. Roy had other servants in a simir situation.

  For example, Yuriko and Alice were still Low-Css.

  But that was normal. It had beehan half a year sihey became Devils.

  Half a year was nothing to a Devil.

  tless Devils remained Low-Css for turies.

  Shizuka was also a Low-Css Devil.

  But she didn't seem to mind, seemingly tent with her role as a maid.

  It didn't matter anyway, as Roy didn't intend for her to fight.

  Saya was also a Low-Css Devil, but she had her Gyarados, so she wasn't in a hurry to increase her strength.

  The irls were all Middle-Css Devils her, so there was o worry about them for now.

  But he had to pn this training camp carefully.

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  The day, they packed their belongings and boarded the train to the Underworld.

  Sona joihem on the luxurious train.

  "Sona, after visiting your family, would you like to join us for the training camp?" Roy asked.

  "Yoing to a training camp? Unfortunately, I've already been assigned a trial by my sister. I won't be able to join you," Sona replied with a sigh.

  "That's a shame. But it's alright. We train together aime," Roy said with a smile.

  "Yes." Sona nodded.

  "We're pnning to visit Rias's family first, then mine. Of course, I'll visit your family as well."

  Sona was delighted to hear that Roy would visit her family.

  "I'll visit your home after my trial as well."

  "It's settled then!"

  Just then, an annou came over the train's inter.

  "Attention passengers, we will be arriving at the Sitri territory shortly."

  "See you ter, Sona!"

  "Goodbye, Sona!"

  "See you..."

  They bid farewell to Sona, who disembarked with her peerage.

  The train tis journey.

  The girls chatted amongst themselves.

  With some time to kill before reag the Gremory territory, Roy took out his game sole.

  Asia sat beside him, cheering him on.

  Koneko sat opposite him, challenging him to a match.

  "Roy, where are we going for the training camp?" Kurome asked, mung on dy.

  "It's a world filled with Spirits," Roy replied, his attention focused on his game with Koneko.

  The girls were intrigued.

  "Are they like Saeko-nee-san's Scyther?" Kurome asked curiously.

  "If that's the case, I have to catch a strong one," Mine decred, puffing out her chest.

  Saya had been showing off her Gyarados, which was incredibly powerful. Even Mine found it troublesome to deal with.

  Although she preteo be unimpressed, Mine was secretly envious.

  "No, they're different from Familiars, although they're also called Spirits. And they greatly enhane's power," Roy expined, finally defeating Koneko.

  Koneko's eyes lit up.

  "Roy-senpai, one more round!" she challenged, eager for a rematch.

  "Alright, one more round."

  Roy accepted her challenge.

  "What kind of training is it? I'm so excited," Kiyome Abe said, looking out the window with anticipation.

  Soon, another annou came over the inter.

  "Attention passengers, we will be arriving at the Gremory territory shortly."

  "Finally," Rias said, stretg. "Everyone, gather your things. We're getting off."

  "Wow! It's so big!" Asia excimed, looking out the window at the vast Gremory territory.

  The nd was ly divided into differeions, resembling a patchwork of fields.

  It was a beautiful sight.

  "This is the Gremory territory? It's so beautiful!" Irina gushed.

  "It is quite impressive. The Lucifuge territory pales in parison," Roy ented.

  He was telling the truth. If the Gremory territory was the size of a city, then the Lucifuge territory was a district.

  Of course, he wasn't including the uninhabited areas.

  The Underworld was vast, and the Devil popution was retively small.

  Rias chuckled, hearing Roy's ent. "I believe with Roy around, our will bee even more prosperous."

  "Yes, yes!" the girls agreed fidently.

  "Hehe, of course. But to truly prosper, we'll need your help," Roy said with a wink, looking at the girls suggestively.

  'Their help? Does he mean having children?' Rias wondered, blushing.

  The irls also blushed, uanding his implication.

  Roy grihehem off the train.

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  They soon arrived at the Gremory family estate, a massive and luxurious castle.

  "Is this Buchou's home?"

  "It's amazing!"

  Xenovia and Irina were awestruck.

  The castle doors opened, and several maids emerged.

  "Wele back, Rias-sama, Roy-sama, and everyohe head maid greeted them with a bow.

  "Let's go inside," Rias said to Roy with a smile.

  "Okay."

  They ehe castle.

  Rias led them towards the dining hall.

  Servants and maids lihe long corridor, weling them.

  "Rias-nee-sama, wele back!" A young boy with red hair ran towards Rias and hugged her.

  "I'm back, Milikas! You've grown so much!" Rias chuckled, patting the boy's head.

  Roy looked at the child curiously. 'Could this be Sirzechs's son?' he wondered.

  But Grayfia was his sister now. Where did this child e from?

  "Rias, who's this?"

  "He's my nephew," Rias expined.

  "e, say hello to everyone."

  "Okay!" Milikas readily agreed and bowed politely. "I'm Milikas Gremory. Pleased to meet you all."

  "He's so cute!"

  "Hello, Milikas!"

  "What an adorable little guy!"

  ...

  They followed Rias a her mother, Venena Gremory.

  Venena was like a mature version of Rias with brown hair. She was incredibly beautiful.

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