Regret

"Sona-chan~!" Serafall came flying in and snatched Sona from Kisuke's clutches before rubbing her own face on hers, "I was so worried! Are you alright!?"

Sona thought that it was just her usual over-the-top skinship but saw the genuine worry within her eyes and felt the little shaking of her hand. Immense guilt immediately washed over her and sincerely apologized, "I'm very sorry, Nee-sama. This came to be because of my inability to become honest. Would you listen to me?"

Surprise crossed Serafall's face, and it was a pleasant one, "I'll listen to everything you have to say~!"

"Then let's return. Sona should be tired and I'll prepare something that could help in her recovery.", Kisuke then turned to look at their surroundings that had already become a white hell and added in, "And return the scenery to normal before we leave."

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Reaching the loghouse, Kisuke left the two sisters citing that he intended to concoct some medicine for Sona so she wouldn't have any further problems or hidden injuries that could hurt her down the line. However, the two of them knew that he's just giving them space.

Even though she was very tired and weak, Sona did her best to express everything to her precious big sister. Once she started, Sona let everything out without holding anything back beginning from her frustrations, anxiety, apprehension, envy, bitterness, jealousy, insecurity, and even irritation.

As time went on, Serafall's face fell and fell until she felt very remorseful and regretful that she had failed to notice all of this, despite giving her as much attention as possible, because she didn't want her to walk the same path as her.

With a past full of war and tragedy, Serafall hid behind her bubbly personality but pledged to protect the peace and innocence of her little sister. Through all of this, she failed to show anything to Sona beyond the surface of the Devil known as 'Serafall'.

In hindsight, it was also her fault that Sona developed these kinds of feelings. Not because the Devil's society decided to hide its bloody history and cover it with glorious victory and reform, but because Serafall didn't show that she too, was just a 'normal' person.

Oblivious to what she's thinking, Sona continued, but this time, expressing how grateful she is to Serafall. The awe and adoration she had for Serafall inspired Sona to go to great lengths to become a better person. Sona wouldn't be as she is today without her, and she wouldn't even think what would happen otherwise.

Now that she'd laid out everything, it was as if a burden that she hadn't noticed until now suddenly disappeared and her mind became even clearer. Even the Demonic Power inside her body became more active in response to that, so Sona couldn't just brush it off as her imagination.

'So it was just that easy... I should have done this from the start.', she then looked up to her sister's frustrated expression and the corners of her mouth went up slightly, 'Well, I don't think I would have made this kind of decision if that didn't happen to me.'

After some inner conflict, Serafall finally heaved a huge sigh before looking straight into Sona's eyes, "Sona-chan, this time, please listen to what I have to say too."

Kisuke returned after an hour and saw the sisters talking amicably, without the previous almost non-perceptible strain between them. Humming, Kisuke intruded on their private time and said, "I've prepared something to eat~!"

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After their meal, Serafall wanted to talk about what really happened earlier and what sort of ability Sona used. However, Kisuke immediately shook his head at her suggestion and said, "Let's do that after you've rested. The two of you need it, especially Sona. Your souls have to return to their normal rhythm if you want to continue practicing."

Serafall closed her eyes and tilted her head, "Hmm... I guess you're right. I'm sorry, but I could hardly keep my curiosity."

Kisuke then stood up while cleaning up the used utensils, "Although morning just came, let's retire for today."

But as soon as they cleaned themselves, Serafall couldn't help but holler when she saw Sona following Kisuke, "Waitwaitwait! Sona-chan! Where are you going?"

Sona's posture instantly stiffened and slowly turned to Serafall before averting her eyes from her, "Err... I'm sleeping with Kisuke. Yep, I'm definitely sleeping."

Despite not having any experience herself, Serafall knew what Sona intended to do, but she just couldn't or didn't know how to point that out, so she could only make a dumbfounded face.

Kisuke, on the other hand, gave Sona's forehead another flick and said, "No. I won't be sleeping yet, so go rest on your own."

If this was the normal Sona, she would have immediately backed down, but thanks to the influence of her darker self and becoming much more honest to herself, her desires became much more pronounced, and maybe, she became more of a Devil compared to her past self, "And I won't either!"

'Didn't you say you're definitely sleeping!?' Kisuke and Serafall were both stunned at how she's acting, "I'm tired, but not that tired! I still have some energy to spare... No, forget that. I have too much energy to use!"

Ignoring their reactions, Sona grabbed Kisuke's arms and started dragging him towards the room at the end of the hallway.

Serafall couldn't believe what she'd just witnessed and likewise, Kisuke couldn't look or was afraid to look at Serafall's face and let himself be dragged away to avoid further confrontation.

Since Sona requested it so strongly, he already guessed that there were some lingering effects that he wasn't sure if they were going to go away any time soon, if ever. Kisuke didn't want to disappoint her, so he acquiesced in silence.

That 'night' Kisuke and Sona put on a simple barrier against eavesdropping and clairvoyance over their room, however, curiosity was eating Serafall inside out and although she knew that she's going to regret it, she drilled a small hole through the barrier and peeked, only to see Sona on top of Kisuke which was unbelievable to her.

Of course, Kisuke and Sona knew of the intrusion, but when the former tried to fix the hole, the latter stopped him before whispering, "Let her get the taste of regret from her own actions."

Kisuke was a bit hesitant, but the curiosity regarding Serafall's reaction got the better of him and he let her go.

Nevertheless, the two of them only expected Serafall to watch for a minute or two but were surprised when she stayed for a whole half an hour before bolting through the skies, leaving the log house entirely.

On the way to her training spot, Serafall's face was flushed as the scene from earlier was imprinted in her mind, 'I had no idea Sona-chan could make a face like that!' Of course, she had already seen the real thing from the videos, but she never thought that it would hit differently when she saw someone close to her doing it, 'Dammit! I wasn't this embarrassed when I watched these things! What's wrong with me!?'