Fio lay on the bed, happily rolling from the headboard to the foot of the bed, until she dragged the blankets right onto the floor.

“Wahaha! After suffering for so long since I got transported to another world, a beauty finally took a liking to me today!”

The silver-haired girl hugged the blankets and kicked her legs happily.

After dinner, Alisa had tidied up a spare room for Fio to stay in for the time being.

“The Ten-Thousand-Year Snow Mountain is cold and boring. Leon’s place has food, drink, and a roof over my head. I really don’t want to go back. Maybe I should just freeload here for the rest of my life?”

Alisa was the perfect wife. Fio figured that if she could get on Alisa’s good side, behave herself around her, and max out her affection, she’d never have to worry about food or a roof over her head for the rest of her life.

The only thing that spoiled it was Leon—

“Damn harem protagonist. Don’t think I’m joining your harem.” Just thinking about him put Fio in a bad mood. “I can’t actually become one of those harem girls from a novel.”

But for now, she didn’t have any good options. How was she supposed to face a monster with such overwhelming desires and protect her purity?

Fio pondered what other advantages she might be able to use.

And besides Leon, there was another problem: his younger sister, Vivian.

“Vivian’s super cute too, but she’s so hostile toward me… Could it be that she likes Leon, so she’s jealous of me?”

Thinking over Leon’s description of Vivian and her attitude toward her, Fio analyzed the situation. Then she smacked her fist into her palm as the answer dawned on her.

“If I set Vivian, who’s into Leon, up with him, maybe he’ll lose interest in me?” Fio considered the possibility and thought up what she’d say. Before long, she slowly drifted off to sleep.

……

“Zzzz……”

“Hey, little kitten. Wake up.”

Half-asleep, Fio felt someone calling to her.

“Zzzz……”

“Little kitten, if you don’t wake up, you’ll regret it. Believe me.”

“Eek!!”

Fio jolted awake as if someone had dumped a bucket of cold water over her.

She was stunned by the sight before her. She’d never imagined she’d find herself in a situation like this, straight out of a manga or a novel.

Fio’s hands were tied to the headboard, leaving her unable to move freely.

A blonde girl was straddling her. There was no light in her eyes, and her cute face was as cold as ice.

Fio immediately reached a conclusion: she’d been ambushed in the night.

“Vivian?!”

“Hehe. Good evening, little kitten.”

Vivian didn’t even bother to put on a token smile. She laughed without changing her expression.

“Vivian, calm down. What are you trying to do?”

“What am I doing? Obviously, I’m getting rid of the bug that could hurt my brother before it causes trouble~”

“I’m the bug? Vivian, you’ve got it all wrong!”

Fio had once fantasized about being surrounded by all kinds of beautiful girls, all fighting over her. If a yandere beauty ever snuck into her room, she’d imagined it would be pretty exciting.

But now, she wasn’t getting to enjoy the protagonist treatment at all. A yandere had mistaken her for an obstacle that needed to be eliminated.

Even with a beautiful girl straddling her like this, she couldn’t enjoy a single bit of the perks. The user experience was terrible!

“Got it wrong? What did I get wrong? My brother’s never acted like this before. He’s never suddenly taken an interest in girls or anything.” As she spoke, Vivian began to cry sadly. “I’ve looked up to my brother ever since I was little. He’s always taken care of me, so I kept hoping things would stay this way forever. My brother wasn’t interested in women anyway, so he’d always just be my brother and never leave me. But… then you suddenly appeared. You’re the one who made my brother like this.”

“Vivian… so that’s what you think.”

Vivian wiped away her tears, then gave Fio a chilling smile.

“That’s why~ I came up with a brilliant plan: secretly get rid of the little kitten sneaking around after my brother. Then he’ll come to his senses and come back to me!”

Fio felt absolutely miserable hearing that plan. She really didn’t want anything to happen between her and Leon, so there was no need for her and Vivian to end up in a conflict like this.

Fio could tell Vivian was serious. She considered attacking her with the Dragon King’s breath, but couldn’t judge how much power to use. She was afraid that if she killed Vivian, Alisa would hate her.

No need for force. Words would do. She’d win this yandere little sister over with reason!

“Vivian, you really have it all wrong. I swear, even if I jumped from here and died out there, I would never do anything with Leon—”

“Shut up! Don’t think you can fob me off with that kind of line! I once heard a guy say the same thing, and in the end he got into a huge fight with his friend over a bowl of fried rice!”

Vivian pulled something out.

It was a small dagger. It looked tiny in Vivian’s hand.

The moment Fio saw the dagger, she shuddered in fright. She was actually being threatened by a yandere girl now.

“Or maybe I should take your first time right here? Then my brother won’t fall for someone else—”

Vivian had come in wearing her pajamas. The thin fabric clung to her body, tracing her graceful curves, while her twin tails had come undone and spilled down like a golden waterfall. She was incredibly dangerous-looking like this.

She leaned down against Fio, stroking her cheek with a pale hand as she murmured suggestively, “It won’t hurt. Don’t worry.”

Emergency! Emergency! Emergency! Emergency! Emergency! Emergency!

An alarm blared in Fio’s mind. She knew she was in grave danger.

Fio’s instincts urged her to stay calm and not shut down here. She desperately wanted to back away, but managed to hold herself together.

Fio looked away, avoiding eye contact—which she found frightening—then slowly began to say what she’d planned.

“I-I understand… Vivian, I promise… I won’t make a move on Leon from now on, and I’ll do everything I can to support your romance with him…!”

“What? Romance?”

“I know… What you feel for your brother isn’t ordinary sibling affection… I-it’s that kind of love, romantic love!”

“How could it be? I-I like my brother?”

Vivian faltered and stopped her attack. She looked as if Fio had hit the mark, and her face turned shy.

Fio seized the glimmer of hope and pressed on eagerly. She still stumbled over her words, but managed to keep them somewhat coherent.

“A forbidden love… The more obstacles there are, the more that repressed love bursts out of control, until it can’t be contained… Right?”

“Fio, if I really do love my brother as a man and woman love each other, wouldn’t you think I was disgusting?”

“Of course not! Let’s work together, Vivian. Honestly, Leon constantly bothering me is a pain… Oh, no, I’m not bragging! I mean, if you and him get together, that would solve my problem too. We want the same thing!”

Vivian thought for a moment, looked at Fio, then lowered her head and pressed a hand to her heart as it pounded wildly. Finally, she nodded.

It worked. Fio let out a huge sigh of relief now that she’d escaped the crisis. Her tense body relaxed, and she slumped onto the bed.

“Don’t tell my brother about this.”

“Of course… Vivian, this is a secret just between the two of us!” Fio spoke with conviction, dispelling Vivian’s doubts.

Thank goodness! That took care of the whole problem. Hehehe. Once the peerlessly clever Ice Dragon King used a little scheme to get Vivian and Leon together, she could settle into a peaceful, happy life as a shut-in!

Fio couldn’t help feeling rather pleased with herself for coming up with such a brilliant plan.