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Disclaimer: I don't own Tokidoki Bosotto Roshiago de Dereru Tonari no Alya-san or any of its characters...

"I messed up… badly. Looks like I can't save her, after all."

"Onii-chan…"

As soon as she was done checking their water supply and doing a daily inspection on the house's solar panels, Yuki returned inside the lodge to check up on her brother.

But to her surprise, the only person who was at the kitchen was Alya. The Russian girl was sitting at the table with her hands clasped together, staring down at the wooden furniture, and unaware that she was even there.

It's like Alya was in a trance of some sort, but that's not important.

Her brother wasn't around like what she had hoped.

She expected to see some kind of progress in her brother's little mission to save Alisa, especially when he was off to such a good start earlier this morning…

But he was nowhere to be found.

Masachika couldn't have left the house, as his shoes were still here, which meant he was upstairs in his room.

But when she got there, Yuki was treated to a sight that nearly made her fall to her knees in horror, and that's before she heard his explanation after asking him what happened.

"Ugh, I'm stupid… I should've kept my mouth shut. But I got complacent. I thought that talking about how things used to be like back in school would do the trick, but it somehow made her angrier with me."

Masachika groaned as he pressed the ice pack into his left foot that was resting on top of a chair, particularly his ankle. It didn't hurt as much as it did earlier, but he might not be able to go downstairs for lunch with everyone else today, at least not without some help.

"I sprained my ankle too because of it…"

"Alya-san really slapped you…?! A-And she stepped on your injured foot too?! Are you okay?!" his sister exclaimed, finally snapping out of her state of disbelief after listening to his recollection of events.

"What do you think?" he remarked sarcastically, before shaking his head in disappointment. "Well, other than the ankle, I guess the only thing that got hurt is my pride. Ah, fuck it… this is what I get for being overconfident."

Yuki stood frozen from where she was, before lowering her head as her hair shadowed over her eyes, which gave her a menacing look.

"That Alya-san… she hurt you… she hurt my Onii-chan…" Yuki clenched her fists so tight that it seemed like she wanted to draw blood from her skin. "I'm going to make her pay…"

Masachika blinked in surprise at the venom she held in her tone, before realizing that his sister was heading for the door.

"Hey, hey, take it easy! Don't make it a bigger problem than it already is, Yuki."

Fortunately, his voice was enough to stop her in her tracks, but it was only for the moment. Right now, Yuki wanted nothing more than to storm over to where Alya is and give her the same treatment that she gave her brother.

"But she hurt you on purpose," she growled. "She shouldn't have done that. I'm going downstairs to give her a piece of my mind."

"I'm telling you right now, don't do anything stupid. It's my problem, not yours. I was the one who pushed her buttons, so she reacted in the way she did."

Yuki turned towards him with a frown. "She was still wrong for hurting you. You didn't deserve this, Onii-chan."

He returned it with one of his own. "I'll deal with that on my own. Starting a fight won't make anything better. Okay? I don't want you to instigate something for my sake. "

"All right. I won't…" she huffed in annoyance, before walking back towards where he was. "It doesn't mean I have to like it."

"Thank you, Yuki."

The girl took a few deep breaths to calm down, while slapping her own cheeks with both hands in an attempt to force herself to think of other things.

She had allowed her impulsive emotions to take over for a moment there, which is something she can't afford to happen at any cost.

Masachika already has his hands full with Alisa, and Yuki didn't want to add herself to that plate again. Moreover, she didn't want to end up exactly like that girl.

After taking a moment to calm down, she put on her usual smile and stood in front of him.

"I guess this is the right time for me to show you something I made. It's the only way I can distract myself from all of this, really. Tada!" she pulled out a strange accessory from behind her and showed it to him. "I worked hard on this for days, so you can use it as much as you want on me, Onii-chan!"

"What's this?" the young man asked, taking the accessory from her hand and observing it, which looked like some kind of collar that's normally used for dogs and other pets…

"It's a collar and a leash! I made it with one of the belts that I brought along. It was tricky to make at first because the leather was tough to break, but I managed to find a way to work around it!"

"And why did you make this?" he asked in confusion.

"So you can use it on me, duh!" she laughed, before kneeling down before him. "Plus, it's technically because of me that you got injured, so don't you think that I deserve some punishment?"

Masachika stared at her in confusion for a few moments, unable to figure out what she was trying to tell him, until he noticed that she was waiting for him to do something.

"...are you saying that you want me to put this on your neck?"

"Mmhm~"

Initially, he stared at Yuki as if she had gone crazy, only to remember certain things about his sister that made him question reality itself when he learned about them.

"Oh, my little sister is such a freak… whatever should I do with you?" Masachika said sarcastically, before simply deciding to give her what she wants.

"Gehehe~" Yuki giggled like a schoolgirl in love after he fastened the makeshift collar she made around her neck.

"This feels so weird…" Masachika thought to himself while holding the leash in his hand. He gave it a little pull, bringing his sister along with it as if she was his loyal pet.

"Hehe, do you like it?" she grinned devilishly, quickly growing to like the sensation of being led somewhere through the collar on her neck.

"...I'd rather not say anything," he looked away with a blush.

"You must feel frustrated with Alya-san, right? I'll be your punching bag if you want, Onii-chan. You can hit me as much as you want!"

Masachika sent her a deadpan look. "I'm not going to hit you. I can't even move without risking my foot getting hurt, idiot."

"Well then, allow me to service you instead~" Yuki moved closer to the bed and grabbed his trousers, pulling it down along with his underwear. "You deserve it for working really hard to get Alya-san's trust and forgiveness, even at the cost of getting hurt."

"No, you don't have to—"

"Hng…"

Too late.

Yuki already brought out his length into view and even though he wasn't at full mast yet, she took him into her mouth and allowed her tongue to the work.

Masachika couldn't do anything else right now, other than to sit back and let his sister do as she pleased.

And, uh… Yuki's actions did feel good. As she bobbed her head up and down, his rod grew until it was fully erect inside her mouth.

"You know, as much as I want to slap Alya-san in the face right now and make her pay for hurting you, it does prove me right. You have to save her, Onii-chan," Yuki spoke after a while, removing her mouth from his erection and letting her hands continue the work.

"I just told you, didn't I?" Masachika gave her a conflicted stare, pulling on the leash so that Yuki can look at him. "I can't save her if I can't even have a peaceful conversation with her."

"No, that's not it. I'm saying that you have to do to her what you did to me, like what I told you last night."

"Why should I?" he frowned, showing that he didn't like that idea from the moment he thought about it.

"Because everyone else will know what Alya-san did to you and trust me, they're not going to tolerate her anymore."

"You're just exaggerating."

"If you think I'm fine with what Alya-san did to you, I'm not. I actually want to go over to where she is and slap her in the face for doing this to you. The only reason why I'm not is because of you. I can't say the same for everyone else, though."

"What do you mean?"

"As soon as they find out what Alya-san did to you, it'll be the straw that breaks the camel's back. Slapping Ayano was something that they can barely overlook, but assaulting and injuring you on purpose? It's a step too far in the wrong direction."

"Look, Masha-san wouldn't let anything bad happen to her," he shook his head, refusing to believe that Alya's own sister would even allow anything bad to happen to her. "We can convince everyone that Alya just lost control for a moment."

"Are you sure about that, Onii-chan? Are you going to wait around and see how Masha-senpai feels?"

He was ready to say yes and agree that Maria wouldn't even dare to think badly of her younger sister but for some reason, he couldn't get it out of his mouth.

Instead, he thought back to when Alisa first had an emotional outburst and was going off on him. It was a moment that brought out a look of anger from the normally calm and collected Maria, someone whom you'd never think would be even capable of being angry with her sister.

While Maria immediately regretted her actions and apologized to Alisa the day after, no one can deny that even she was capable of having those strong emotions.

And because of this, Masachika was unable to answer his sister's question with conviction.

"All right, fine. Let's say you're right and that I have to 'save' her, but can't I do something else that's not what you suggested? There has to be another way other than… you know, doing the thing with her. I can't… it's too much for me."

"You had no problem doing it with me," she pointed out with a shrug.

"Look, you're a different case than Alya. Okay? I'll admit that."

Yuki smirked, before kissing the tip of his length. "Hmm, how exactly am I different? If anything, I kind of expected you to be a lot more adamant on refusing me because we're siblings."

"I gave in because I didn't want to see you cry again. Even if your feelings for me are messed up, seeing you cry like you did that night was too much…" he admitted, rubbing the back of his neck somberly.

The girl blinked in surprise at hearing his reasons, but she also felt touched at how much he actually cared for her.

"Onii-chan, I didn't cry because you were rejecting my feelings. It's because you were going to leave me and I didn't want it to happen again…"

Their gazes met for a brief moment, showing a moment of understanding between siblings before Masachika spoke up again.

"Even so, you're still different from Alya," he continued to persist, unwilling to resort to this option. "You can make your own decisions, and I respect it. I don't have any influence in that. I've lost any kind of influence in that. On the other hand, Alya isn't in the right state of mind, and I can't take advantage of that. I don't want to take advantage of that."

"You won't be taking advantage of Alya-san. All you'll be doing is showing her that you're someone she can rely on, even after everything that's happened."

"You sound so sure of yourself that it would work…" he raised an eyebrow while his voice was laced with skepticism. "In case you've forgotten, she won't even listen to a word I say. I even got a sprain as a reminder for it."

"Maybe she doesn't want to hear anything from you, Onii-chan. I think it'll just remind her that you verbally sided with me instead of her. Actions speak louder than words, after all."

His eyes widened.

"You don't have to tell her anything, Onii-chan. Make it clear through your actions that you're still by her side, and she'll see how important you actually are to her."

Masachika thought about her suggestion and somehow found himself agreeing with it. But there was something else that's bothering him regarding this matter.

"...what do you even get from this, Yuki? Didn't you make it clear that you have feelings for me?" he asked.

"Why, yes I do~!" she nodded happily. "I've always loved you, Onii-chan."

"Then why are you pushing for me to do this with Alya? What exactly do you gain from this?"

"Well… I know how important Alya-san is to you. And I want you to be happy," she explained.

"That makes no sense at all, dumbass. True, Alya is important to me, but I don't see how me doing this with you and then her is gonna make me happy. In fact, I feel disgusted with myself already."

"Hmm, I guess you would feel that way~" she snickered.

"Oi. You're pretty weird too, Yuki. Why the hell are you trying to push me into bedding Alya when I'm already doing this with you? Isn't that cheating? You want me to cheat on you?"

"No, I'm not into reverse netorare! You're so mean for even asking that kind of question, Onii-chan…" she pouted while throwing a glare at his direction.

The expression on her face was enough to deal a critical blow to his defenses, but Masachika held himself firm.

"Y-You can't blame me for being weirded out by this…" he muttered, twirling the leash around his finger.

Her serious look disappeared in an instant. "Hehe… well, if you want my serious answer, it's because we're not dating. There's no cheating if we're not dating in the first place, Onii-chan. And besides, we can't go out with each other. You said so yourself, remember?"

"That's fair, but… it's still wrong that you're telling me to do this whole thing with Alya when I'm already doing it with you."

"Oh, Onii-chan… it warms my heart that you're concerned for me like that~" she looked up at him lovingly. "But you have to, if you want to save Alya-san. Would you be able to live with yourself if something bad happened to Alya-san, knowing that you could have saved her from it?"

"Of course not."

"And that's why you have to do it. For her sake. You don't have to worry about me, because I'll be supporting you every step of the way~"

"This is ridiculous…" Masachika groaned in exasperation, but he did nod to show that he understood everything he said.

"I knew you'd understand! Oh, and this is the best part~" Yuki chuckled. "You don't have to act overly kind towards Alya-san while you're at it."

"What are you saying?"

"Alya-san's attitude must have irritated you at some point, right? Especially now when she hurt you physically. You're free to treat her in the same way," she explained while tugging on the leash herself.

From here, Yuki moved her hands faster, feeling immense satisfaction at seeing the look of pleasure on Masachika's face.

"You don't have to hold back your own frustrations. You can make her feel the same way you did for some well-deserved payback."

"H-How would that even help her, you idiot? Wouldn't it hurt her more?"

"Oh, you'll see for yourself when you do, Onii-chan… just trust me~"

She took in his entire length into her mouth again, bobbing her head up and down her brother's crotch. This time she had full intent of bringing him to his climax.

"It won't take long now, Onii-chan. She'll realize it soon too. Alya-san will need you more than you could ever imagine~"

"Nnngghh…"

Masachika quickly reached his high point as a result of her actions, and Yuki did her best to catch it in her mouth before swallowing it down.

There was too much of it that she had to cover her mouth with her hand to keep it contained, but even with that, some of it leaked out of her mouth and fell to the floor.

"Oh, no! I spilled some of it…" Yuki moaned sadly, disappointed in herself that she didn't get to stuff his entire load into her mouth.

"Then you know what you have to do, don't you? After all, you started this in the first place."

He reached out to grab the top of Yuki's head, before slamming it down to the floor, making his sister yelp in pain.

Fortunately, she was able to turn her head to the side before impact, but it still hurt nonetheless. Yuki tried to look up at him but from her current position, it was hard to do so.

When she finally got a good look at Masachika, his expression turned serious, almost reminiscent of the sinister look that he would have whenever they did their usual competitions.

"Clean up your own mess."

"Y-Yes, Onii-chan~!" she answered in mad glee, proceeding to lick his fluids off the floor happily.

MINASAN, YONDE KURETE ARIGATŌ! AISHITEMAAAAASUUUUU! *starts playing air guitar*

-Lance