~ Support & Read 17 Advanced Chapters on My Patreon!

  ....

  Seeing how eager Sona was to try, I handed her the vial.

  After opening the vial, Sona drank a portion of my blood. Her expression immediately ged as a wave of pain washed over her.

  In the instant, Sona colpsed to her knees, her body emitting billows of red steam.

  "Sona, just hold on a little longer. You'll fuse with it pletely soon!" I enced her from the side.

  Just as I finished speaking, the pained expression on Sona's face vanished, and a powerful Draic aura emanated from her body.

  "How do you feel, Sona?"

  "Sona-kaichou, are you alright?"

  "Kaichou..."

  Seeing this ge, the Student cil members gathered around Sona, etched on their faces.

  "I... I feel much stronger. It's like I've almost reached the level of an Ultimate-css Devil." Sona said, marveling at the ges in her body.

  Tsubaki and the others were astonished when they heard their president's words.

  Sona, in particur, could clearly feel the powerful presence of the dragon within her.

  "Sona, you haven't fully absorbed this power yet. But as time goes on, your strength will increase even faster!" I expio Sona.

  "Yes, I uand, Kyoya. Thank you so much!"

  Sona expressed her gratitude to me sincerely.

  "Hehe, with our retionship, there's no need for suality, is there?"

  Hearing Sona's thanks—I walked over aly stroked her smooth, short hair, then teased her.

  "Kyoya..." Feeling my hand on her head, even the usually calm and collected Sona blushed.

  "Alright, I won't tease you anymore. up is Tsubaki. Let's do o a time!"

  ....

  Then, I had the girls try one by one. I stayed nearby in case anythi wrong.

  Thankfully, they all mao absorb the power successfully, and their strength increased signifitly.

  The girls immediately decided to spar, saying they wao familiarize themselves with their new power.

  I watched them fight, a smile tugging at my lips.

  Just as I was starting to get bored watg them, a soft, cute voice called out from the distance.

  "Sona-~~"

  Hearing this voice, I looked in the dire it came from. Seeing who it was, I was momentarily stunned. Another familiar character had appeared.

  It etite, busty beauty.

  She looked somewhat simir to Sona, with long, bck hair styled in twin-tails that flowed behind her. Strangely, she was wearing a pink magical girl outfit and holding a magical girl wand. What a bizarre individual.

  "O-Onee-sama!?"

  Seeing this person, Sona's face twitched untrolbly, and she even stuttered.

  It was Serafall Leviathan, Sona's older sister and one of the Four Satans. She was known for her cheerful personality, her love of magical girl outfits, and her extreme sister plex.

  As Serafall approached, the system issued a ask.

  [Ding! Discovered target character: Serafall. Task Grade: Bck. Task dition: Have her wear the system-rewarded (Exquisite Magical Girl Outfit).]

  'I k!' I thought to myself. 'That's why the system gave me that magical girl outfit. It art of its pn.'

  This task was both simple and difficult.

  Serafall loved magical girl outfits. If I offered her the Exquisite Magical Girl Outfit, she would definitely accept it.

  But Serafall was also areme sis! She had eveen up anyone who had tried to propose to Sona.

  If she found out that Sona was living with me...

  'Hiss!!'

  Just thinking about it made me shiver!

  I o e up with a foolproof pn.

  While I was thinking, Serafall had already arrived beside everyone and greeted them.

  "Yahoo, hello everyone!"

  "Onee-sama..."

  "Serafall-sama, hello."

  "Greetings, Serafall-sama."

  "...."

  The Student cil members all greeted this Maou.

  "Sona-, did you miss your Onee-sama? I heard Sona- was in danger, so I came right away!"

  Serafall said, blinking and making a "V" sign with her hands.

  "If I hadn't known my cute Sona- was safe, I would have attacked Grigori!"

  "!!!"

  "Onee-sama, you please stop saying such terrifying things? It's really causing trouble."

  "And I told you, Kokabiel was defeated by Kyoya, so why did you e to the Human world? You're a Maou!"

  Serafall's eyes suddenly nded on Kyoya, and she immediately grabbed my hand. "Oh! It's finally o meet you! Kyoya, you're little Rias-'s fiancé, right? Thank you so much for proteg Sona-."

  "I'm Sona-'s older sister—one of the Freat Satans of the Underworld, Serafall Leviathan. If you e to the Underworld, you mention my name. and no one will dare bully you!"

  Serafall said, puffing out her chest proudly.

  Hearing this, I was momentarily stunned. Was I about to bee a spoiled brat, backed by one of the Freat Satans of the Underworld? It didn't seem like a bad idea.

  "Sona and I are close friends. Proteg her is something I should do. There's no need for thanks."

  I just smiled faintly at Serafall's gratitude.

  "Hehe, but no matter what, I still have to thank you for saving my sister."

  Serafall wi me, striking a cute pose.

  "Also, Sona-, you haven't been affeate with your dear Onee-sama anymore! It makes me so sad! Sniff, sniff..."

  Then, Serafall preteo cry, looking at Sona.

  And I finally withe legendary "instant face ge."

  Tomoe, beside me, whispered, "Kyoya, don't mind it! Serafall-sama is always like this when she sees Sona-kaichou. Just get used to it."

  I twitched my lips, not knowing what to say. I could only remain silent.

  "Onee-sama, you please stop being so childish. I'm all grown up now. You've dohis so many times. I won't fall for it anymore."

  Sona pressed her hand against her sister's head and sighed.

  But I raised an eyebrow.

  'Sona, you're really something. Aren't you fetting that you have a slight sister-plex yourself?'

  I remembered Sona once saying, "I absolutely won't let my sister e into tact with those harmful pests."

  'One is areme sis-, the other a mild one. You really are sisters!' I mused.

  ????

  ~ 17 Advanced Chapters Avaible on Patreon!

  https://p-atreon./dragonnx

  (Just remove the hyphen to access Patreon normally.)